NCERT Solutions for Class 8 Maths CBSE

NCERT Solutions for CBSE Class 8 Mathematics Chapter 1 Rational Numbers

Practise NCERT Solutions for CBSE Class 8 Mathematics Chapter 1 Rational Numbers at TopperLearning. Learn to find the reciprocal of a given number by understanding the multiplicative inverse. Revise how a number can be placed on a number line and how problems based on the properties of rational numbers can be solved.

The numbers of the form  , where p and q are integers and q ≠ 0 are called rational numbers.

For example .        

Rational numbers are

1. Closed under the operations of addition, subtraction and multiplication.

2. Commutative under the operations addition and multiplication.

3. Associative under the operations addition and multiplication.

The number

1. 0 is the additive identity for rational numbers.

2. 1 is the multiplicative identity for rational numbers.

The additive inverse of the rational number   is  and vice-versa.

The reciprocal or multiplicative inverse of the rational number  is , if   .

Multiplication is distributive over addition and subtraction of rational numbers. That is, for any three rational numbers a, b and c,

a ×(b + c) = a × b + a × c and a × (b - c) = a × b - a × c

Rational numbers can be represented on a number line. Between any two given rational numbers there are countless rational numbers.

This CBSE Class 8 Maths solutions covers rational numbers and basic problems related to rational numbers. Our subject experts have provided solutions to these problems. If you have doubts while practising the chapter solutions, post them on the ‘Ask a doubt’ section of our study portal. Our experts will respond through the platform and resolve your doubts at the earliest.

Chapter 1 - Rational Numbers Exercise Ex. 1.1

Use the correct properties and perform operations on rational numbers. Students are advised to follow correct steps and avoid calculation mistakes. Refer to NCERT Solutions for Class 8 Mathematics on TopperLearning,  to check your answers once you have solved the exercise.

Chapter 1 - Rational Numbers Exercise Ex. 1.2

Represent the rational numbers on the number line and also find the rational numbers existing between two rational numbers. This exercise builds concepts related to the number system. Analyse your answers by referring to CBSE Class 8 Maths textbook solutions. Remember, our doubt solver "Ask a doubt" is there to solve your doubts round the clock.

NCERT Rational Numbers Class 8 Videos

NCERT Rational Numbers Class 8 Revision Notes

NCERT Rational Numbers Class 8 Most Important Questions

NCERT Rational Numbers Class 8 MCQ

NCERT Rational Numbers Class 8 Short Answer Questions

List of Sub chapters

Class 8 Maths- Introduction To Rational Numbers

Class 8 Maths - Representation On Number Line

Class 8 Maths - Rational Numbers Between Rational Numbers

NCERT Solutions for Class 8 Maths Chapter 2 Linear Equations in One Variable

Get the NCERT Solutions for CBSE Class 8 Maths Chapter 2 Linear Equations in One Variable on TopperLearning. Learn to solve equations with variables on both sides. Understand how to solve equations with numbers on one side or linear expressions on the other side.

1. An equation is a statement of equality of two algebraic expressions involving one or more unknown quantities.
   
   
2. An equation involving only a linear polynomial is called a linear equation.
   For example: 
3. Any value of the variable which makes the equation a true statement is called the solution or root of the equation.
   For example: - 2 is root of the equation 3x - 2 = -8.
   
   
4. Any term of an equation may be taken to the other side with its sign changed, without affecting the equality. This process is called transposition.
   
   
5. Without changing the equality, we may
   i. add the same quantity to both sides of the equation.
   ii. subtract the same quantity from both sides of the equation.
   iii. multiply both sides of the equation by the same non-zero quantity.
   iv. divide both sides of the equation by the same non-zero quantity.
   
   
6. If   , then q (ax + b) = p (cx + d)

This process is called cross multiplication.

Also, practise linear equation problems based on real situations by using our Class 8th Maths NCERT solutions. If the chapter concepts are still giving you a hard time, check our practice tests. Use our ‘Ask a doubt’ section on our study platform to get guidance and solutions to difficult doubts

Chapter 2 - Linear Equations in One Variable Exercise Ex. 2.1

Solve basic operations on equations with one unknown variable. These questions also involve rational number calculations as solved in NCERT Solutions for CBSE Class 8 Maths. Such questions are often asked for 1-2 marks in the final examination. Refer to weekly tests and CBSE Class 8 Maths CBSE online Class 8 paper for practice.

Chapter 2 - Linear Equations in One Variable Exercise Ex. 2.2

Apply your knowledge of solving equations with one variable in a word problem. The step-wise approach for writing the solution can be understood properly with TopperLearning’s NCERT Solutions for Class 8 Maths.

Chapter 2 - Linear Equations in One Variable Exercise Ex. 2.3

Deal with variable on both sides in an equation and find the correct answer with NCERT Solutions for Class 8 Maths. Check each step of the solutions and practise some more problems using the most important questions and weekly test.

Chapter 2 - Linear Equations in One Variable Exercise Ex. 2.4

Apply your knowledge of solving a linear equation with a variable on both sides with NCERT Solutions for Class 8 Maths. Understand thoroughly what information is provided in the question and check each step of the calculation as given in our CBSE Class 8 Maths solution.

Chapter 2 - Linear Equations in One Variable Exercise Ex. 2.5

Simplify and solve the given linear equations with NCERT Solutions for Class 8 Maths. The knowledge of concepts such as LCM and operation on fractions, from the previous grades, are useful here. Revise these concepts from the revision notes provided by TopperLearning’s CBSE Class 8 notes.

Chapter 2 - Linear Equations in One Variable Exercise Ex. 2.6

A mixed bag of problems based on simplification and summary questions challenge students in this exercise. TopperLearning provides a well-explained and detailed solution with its NCERT Solutions for Class 8 Maths. Practise more problems with the weekly tests and CBSE Class 8 sample paper 2020-21.

NCERT Linear Equations in One Variable Class 8 Videos

NCERT Linear Equations in One Variable Class 8 Revision Notes

NCERT Linear Equations in One Variable Class 8 Most Important Questions

NCERT Linear Equations in One Variable Class 8 MCQ

NCERT Linear Equations in One Variable Class 8 Short Answer Questions

List Of Sub Chapters

Class 8 Maths- Solving Linear Equations

Class 8 Maths - Application Of Linear Equations

NCERT Solutions for Class 8 Maths Chapter 3 Understanding Quadrilaterals

Refer to TopperLearning’s NCERT Solutions for CBSE Class 8 Mathematics Chapter 3 Understanding Quadrilaterals to revise your textbook problems. Understand the properties of quadrilaterals. Learn about convex quadrilaterals and concave quadrilaterals with step-wise answers for textbook questions.

Practise NCERT questions based on parallelograms and polygons with our CBSE Class 8 textbook solutions. Use them to explore the problem-solving techniques in Maths and learn to study independently. With self-study, you will have the confidence to solve problems on your own in your exam.

Chapter 3 - Understanding Quadrilaterals Exercise Ex. 3.1

Acquaint yourself with a special kind of polygon, Quadrilaterals, with NCERT Solutions for Class 8 Maths. Learn about their different properties about angles and sides. This exercise introduces and informs students about the basics of a quadrilateral.

1. A plane figure formed by joining a number of points without lifting a pencil from the paper and without retracing any part of the figure is called a curve.
2. A curve which does not cut itself is called an open curve.
3. A curve which cuts itself is called a closed curve.
4. A simple closed curve is a closed curve which does not pass through one point more than once.
5. A simple closed curve made up of line segments is called a polygon.
6. The line segments that constitute a polygon are known as its sides and their end points are known as the vertices of the polygon.
7. Any two sides with a common end-point (vertex) are called the adjacent sides.
8. The end points of the same side of a polygon are known as the adjacent vertices.
9. The line segment obtained by joining vertices which are not adjacent are called the diagonals of the polygon.
10. Number of diagonals in a polygon of n sides =  
11. A quadrilateral is a four sided polygon
12. The sum of all the angles of a quadrilateral is 360^o.
13. If the line containing any side of the quadrilateral has the remaining vertices on the same side of it, then the quadrilateral is called a convex quadrilateral. 
14. In a convex quadrilateral the measure of each angle is less than 180^o.
15. The sum of the interior angles of a pentagon is 540^o

Chapter 3 - Understanding Quadrilaterals Exercise Ex. 3.2

Apply the concept of Sum of the Measures of the Exterior Angles of a Polygon in this exercise with our NCERT Solutions for Class 8 Maths. These questions are popular in the objective category in CBSE Class 8 Maths.

Chapter 3 - Understanding Quadrilaterals Exercise Ex. 3.3

Dive in deeper to understand different kinds of quadrilaterals and their properties with some unusual problems. There are some more questions for assessment available along with revision notes, and weekly tests in CBSE Class 8 sample papers 2020-21. In addition, the NCERT Solutions for Class 8 Maths provide detailed solution for every question.

Chapter 3 - Understanding Quadrilaterals Exercise Ex. 3.4

Get to know more about rhombus, rectangle, and square in the final exercise of this chapter. Questions from this exercise have been asked in the subjective section of CBSE Class 8 sample paper 2020-21.

NCERT Understanding Quadrilaterals Class 8 Videos

NCERT Understanding Quadrilaterals Class 8 Revision Notes

NCERT Understanding Quadrilaterals Class 8 Most Important Questions

NCERT Understanding Quadrilaterals Class 8 MCQ

NCERT Understanding Quadrilaterals Class 8 Short Answer Questions

List Of Sub Chapters

Class 8 Maths- Polygons And Their Classification

Class 8 Maths - Quadrilaterals

Class 8 Maths - Properties Of Parallelograms

NCERT Solutions for CBSE Class 8 Mathematics Chapter 4 Data Handling

Understand your Maths chapter concepts with TopperLearning’s NCERT Solutions for CBSE Class 8 Maths Chapter 4 Data Handling. Practise making a frequency distribution table or a bar graph according to the given data in your textbook exercises. Our solutions will guide you in making tables or graphs to represent data correctly using data handling techniques.

A collection of information is called the data. Data obtained in the original form is called a raw data.

The systematic arrangement of data, either in ascending or in descending order, is called an arrayed data.      

The number of times a particular observation occurs is called its frequency.

The difference between the highest and lowest values of the observations in a given data is called its range.

When the number of observations is large, the data is usually organized into groups, called class intervals.

Pie chart represents data in relative quantities by using the area of sectors in the circle.

Central angle for a component =  

Chapter 4 - Data Handling Exercise Ex. 4.1

Grasp extensive knowledge about organising ungrouped data and also learn about bars that have a difference in this exercise. Tally your final answers with NCERT Solutions for CBSE Class 8 Maths and in case of doubt, get in touch instantly with our team of subject experts using the doubt solver “Ask a doubt”.

Chapter 4 - Data Handling Exercise Ex. 4.2

Learn more about deducing answers from pictorial representation and check your solutions with NCERT Solutions for CBSE Class 8 Maths.

Chapter 4 - Data Handling Exercise Ex. 4.3

NCERT Solutions for CBSE Class 8 Maths provides you with all the solutions to questions from this exercise, where probability and data have been combined to challenge students. This helps students with Maths in the higher grades and competitive exams as well.

NCERT Data Handling Class 8 Videos

NCERT Data Handling Class 8 Revision Notes

NCERT Data Handling Class 8 Most Important Questions

NCERT Data Handling Class 8 MCQ

NCERT Data Handling Class 8 Short Answer Questions

List Of Sub Chapters

Class 8 Maths- Frequency Distribution

Class 8 Maths – Pictographs

Class 8 Maths - Pie Charts

Class 8 Maths - Bar Graphs And Histograms

Class 8 Maths – Probability

NCERT Solutions for CBSE Class 8 Mathematics Chapter 5 Squares and Square Roots

Practise NCERT Solutions for CBSE Class 8 Maths Chapter 5 Squares and Square Roots with our experts to get better at Maths. Learn to factorise the given numbers. Revise the correct problem-solving methods to use square roots for finding answers to application questions.

Finding square roots through different methods

1. Repeated subtraction
2. We stated above that the square of a number is the sum of first n odd natural numbers. So, square root of a square number can be obtained by subtracting the successive odd natural numbers starting from 1 till we get 0.
3. Prime factorization
4. Express the number as the product of prime numbers, group the common primes in a pair, take one prime from each pair and then multiply to get the square root.
5. Division method
6. This method can also be used to find the square root of a non-perfect square or decimal number. 

TopperLearning’s NCERT solutions will also guide you on how to make a number a perfect square by applying your CBSE Class 8 Maths syllabus concepts. For more practice, watch the video lessons, CBSE sample paper Class 8 and other self-learning materials available on our online education platform.

Chapter 5 - Squares and Square Roots Exercise Ex. 5.1

How do we find squares and square roots using patterns? Let us find it out with NCERT Solutions for CBSE Class 8 Maths.

Chapter 5 - Squares and Square Roots Exercise Ex. 5.2

Find squares observing some more patterns and Pythagorean triplets as we provide you with  NCERT Solutions for CBSE Class 8 Maths. All your doubts will be solved by our Math experts on our doubt solver “Ask a doubt”.

Chapter 5 - Squares and Square Roots Exercise Ex. 5.3

Enlighten yourself with different methods of finding square roots in this exercise and check your answers with NCERT Solutions for CBSE Class 8 Maths.

Chapter 5 - Squares and Square Roots Exercise Ex. 5.4

Can we find square roots of numbers with decimal points? Have a problem with finding square roots? This topic can be best understood by watching our video solutions. Check your method and ask your queries on TopperLearning’s NCERT Solutions for CBSE Class 8 Maths. This chapter is all about calculations, hence it is advisable to take the weekly tests and refer CBSE Class 8 Maths sample papers for practice.

NCERT quares and Square Roots Class 8 Videos

NCERT quares and Square Roots Class 8 Revision Notes

NCERT quares and Square Roots Class 8 Most Important Questions

NCERT quares and Square Roots  Class 8 MCQ

NCERT quares and Square Roots Class 8 Short Answer Questions

List Of Sub Chapters

Class 8 Maths- Properties Of Square Numbers

Class 8 Maths – Patterns In Square Numbers

Class 8 Maths - Square And Triangular Numbers

Class 8 Maths - Finding Square Root

Class 8 Maths - Estimating Square Roots

Class 8 Maths - Applications Of Squares And Square Roots

Class 8 Maths – Short Cut Methods For Finding Squares

NCERT Solutions for CBSE Class 8 Mathematics Chapter 6 Cubes and Cube Roots 

Study Maths by using NCERT Solutions for CBSE Class 8 Maths Chapter 6 Cube and Cube Roots on our trusted study portal. Learn how factorisation can be used to solve problems on finding the perfect cube. Understand how to calculate cube roots as per the given data in your textbook questions of the CBSE Class 8 syllabus.

Cube number 

Cube of a number is obtained when it is multiplied by itself thrice.

If ‘a’ is a number, then the cube of ‘a’ is a3 = a × a × a.

A natural number n is a perfect cube if n can be expressed as m3, for some natural number m. The numbers 1, 8, 27 are perfect cubes.

To find whether a number is a perfect cube or not:

Express the number as the product of prime factors.

If each factor appears three times in the prime factorization, the number is a perfect cube.

If there are one or more factor(s) which do not appear 3 (or multiples of 3) times, the number is a non-perfect cube.

64 = 4 × 4 × 4, is a perfect cube. 72 = 2 × 2 × 2 × 3 × 3 = 22 × 32, is not a perfect cube.

TopperLearning’s NCERT textbook solutions for CBSE Class 8 Maths will help you a great deal during chapter revision. If you feel stuck while trying to solve a particular question, visit our ‘Ask a doubt’ section to look for solutions or to post a question related to your doubt.

Chapter 6 - Cubes and Cube Roots Exercise Ex. 6.1

Solve this exercise and get introduced to cubes. The calculation part can be referred to from TopperLearning’s NCERT Solutions for CBSE Class 8 Maths. 

Chapter 6 - Cubes and Cube Roots Exercise Ex. 6.2

Learning various methods of finding the cube root of a number and quickly tally your solutions with NCERT Solutions for CBSE Class 8 Maths. These questions are scoring, hence go through some practise questions from TopperLearning’s study material and CBSE Class 8 Maths sample papers.

NCERT Cubes and Cube Roots Class 8 Videos

NCERT Cubes and Cube Roots Class 8 Revision Notes

NCERT Cubes and Cube Roots Class 8 Most Important Questions

NCERT Cubes and Cube Roots Class 8 MCQ

NCERT Cubes and Cube Roots Class 8 Short Answer Questions

List Of Sub Chapters

Class 8 Maths- Perfect Cube

Class 8 Maths – Cube Numbers

Class 8 Maths - Cube Roots

NCERT Solutions for CBSE Class 8 Mathematics Chapter 7 Comparing Quantities 

How to compare the speed of a scooter with that of a cycle? What steps should you follow to calculate the selling price of an article? Get your answers by revising textbook problems using NCERT Solutions for CBSE Class 8 Mathematics Chapter 7 Comparing Quantities.

Ratio and percentage

Ratio means comparing two quantities with each other.

Percentages are numerators of fractions with denominator 100. The symbol '%' is used for percent and it indicates multiplication with  

Increase or decrease percentage

Percentage increase/decrease =  

Discount 

In order to give a boost to the sales of an item or to clear the old stock, articles are sold at reduced prices. This reduction is given on the Marked Price (MP) of the article and is known as discount.

Discount = MP – SP

Discount % =  

 

Simple Interest

If the interest is calculated uniformly on the original principal, it is called the simple interest.

If P, R, T stand for principal, rate and time respectively, and SI stands for simple interest, then

 

Understand the CBSE Class 8 Maths chapter concepts such as Principal, Cost Price, Rate of Interest, Marked Price etc. with our NCERT solutions. To score high marks in Maths, you need conceptual clarity and sufficient practice. Explore TopperLearning’s CBSE sample paper Class 8, online practice tests etc. to prepare well and to score high marks in your exam.

Chapter 7 - Comparing Quantities Exercise Ex. 7.1

Revise the concept of ratios and percentages by solving this exercise. Check CBSE Class 8 Maths Chapter 8 Exercise 8.1 Solution to compare your answers.

Chapter 7 - Comparing Quantities Exercise Ex. 7.2

You can familiarise yourself with CBSE Class 8 syllabus with the basic concept of computing increase and decrease in percentage and discounts. This exercise also focuses on understanding the real-life concept of Value added tax (VAT). An elaborate solution for every question of this exercise has been provided on TopperLearning’s NCERT Solutions for CBSE Class 8 Maths.

Chapter 7 - Comparing Quantities Exercise Ex. 7.3

Find how to calculate Compound Interest and also read how the formula for compound interest was deduced. Solve the exercise and check CBSE Class 8 Maths Chapter 7 Exercise 7.3 Solution to compare your answers.

Questions based on this concept are often asked in competitive exams, hence, students must refer to R D Sharma solutions for more practice questions.

NCERT Comparing Quantities Class 8 Videos

NCERT Comparing Quantities Class 8 Revision Notes

NCERT Comparing Quantities Class 8 Most Important Questions

NCERT Comparing Quantities Class 8 MCQ

NCERT Comparing Quantities Class 8 Short Answer Questions

List Of Sub Chapters

Class 8 Maths- Ratios Of Quantities

Class 8 Maths – Percentages

Class 8 Maths - Application Of Percentages

Class 8 Maths - Discount

Class 8 Maths – Profit And Loss

Class 8 Maths – Sales Tax

Class 8 Maths – Compound Interest

Class 8 Maths – Time And Work

NCERT Solutions for CBSE Class 8 Mathematics Chapter 8 Algebraic Expressions and Identities 

Get the model answers by some of the best Maths experts to revise textbook problems. Check TopperLearning’s NCERT Solutions for CBSE Class 8 Maths Chapter 8 Algebraic Expressions and Identities. Learn to find the sum of algebraic expressions in your textbook problems. Also, practise multiplication, division, and subtraction of algebraic expressions with our Maths support resources.

What are constant and variable?

Constant is a symbol that takes fixed numerical value which is represented by letters.

Variable is a symbol that takes various numerical values which is represented by letters. 

Algebraic Expression

A combination of constants and variables connected by the operators +, -, Χ  and   is known as an algebraic expression.

Example: 15 x 2 – 9x + 4xy is an algebraic expression.

What is an identity?

An identity is an equality, which is true for all values of variables in it.

On the other hand, an equation is true only for certain values of the variables in it. An equation is not an identity.

Some standard and important identities:

(a + b)² = a²+2ab+b²

(a – b)² = a² – 2ab + b²

(a + b)(a – b) = a² – b²

(x + a)(x + b) = x² + (a + b)x + ab

Use of algebraic identities

The algebraic identities are useful in carrying out the square and products of algebraic expressions.

They can also be used as an alternative method to calculate product of numbers.

Revise the concept of identities and practise application of identities with our CBSE Class 8 Maths NCERT textbook solutions. All our Maths self-study resources are available online and can be used according to your revision schedule.

Chapter 8 - Algebraic Expressions and Identities Exercise Ex. 8.1

Study about Terms, Factors and Coefficients for Monomials, Binomials and Polynomials in an Algebraic expression. This exercise also has questions on the Addition and Subtraction of Algebraic Expressions. Attempt these questions and refer to the solution sheet on TopperLearning’s NCERT Solutions for CBSE Class 8 Maths. More the practice, better the understanding. Attempt questions from the weekly test and most important questions from this chapter.

Chapter 8 - Algebraic Expressions and Identities Exercise Ex. 8.2

After understanding the addition and subtraction of algebraic expressions, let us learn about the Multiplication of Algebraic Expressions and check our solutions by referring to TopperLearning’s NCERT Solutions for CBSE Class 8 Maths.

Chapter 8 - Algebraic Expressions and Identities Exercise Ex. 8.3

The multiplications process for Algebraic Expressions have many aspects and hence is divided into sections in CBSE Class 8 Maths. Understand the process of Multiplying a Monomial by a Polynomial with TopperLearning’s NCERT Solutions for CBSE Class 8 Maths. Solving ehese problems gives an eighth-grader confidence to solve more complex problems.

Chapter 8 - Algebraic Expressions and Identities Exercise Ex. 8.4

Let’s take a step ahead and grasp the process of multiplying a Polynomial by a Polynomial with TopperLearning’s NCERT Solutions for CBSE Class 8 Maths. Feel free to use our doubt solver “Ask a doubt” when you have doubts. Address your concerns by practicing more by using our video lectures, MCQs, and CBSE Class 8 Maths sample paper.

Chapter 8 - Algebraic Expressions and Identities Exercise Ex. 8.5

Learn basic identities that are applicable to every grade after class 8. These identities are extremely important in CBSE Class 8 syllabus and are very often asked in exams. Solve every question from the exercise and take the tests to evaluate your knowledge. Refer to CBSE Class 8 Maths sample papers for better insight.

NCERT Algebraic Expressions and Identities Class 8 Videos

NCERT Algebraic Expressions and Identities Class 8 Revision Notes

NCERT Algebraic Expressions and Identities Class 8 Most Important Questions

NCERT Algebraic Expressions and Identities Class 8 MCQ

NCERT Algebraic Expressions and Identities Class 8 Short Answer Questions

List Of Sub Chapters

Class 8 Maths- Introduction To Algebraic Expressions

Class 8 Maths – Addition And Subtraction Of Algebraic Expressions

Class 8 Maths - Multiplication Of Polynomials

Class 8 Maths - Algebraic Identities

Class 8 Maths – Expansion Using Algebraic Identities

NCERT Solutions for CBSE Class 8 Mathematics Chapter 9 Mensuration

How to calculate the perimeter of a square or a rectangle? How to compute the area of a pentagon? Learn by practicing the NCERT Solutions for CBSE Class 8 Maths Chapter 9 Mensuration with TopperLearning. When you practise the expert solutions, you will understand the ways to apply the techniques to find the area of real objects.

Area of a polygon (or field) can be calculated by suitably dividing it into triangle, rectangle, trapezium etc. Surface area of a solid is the sum of the areas of all its faces. Amount of region occupied by a solid is called its volume.

For a cuboid of length l, breadth b and height h, we have:

Volume of cuboid = (l   b   h) cubic units

Total surface area of cuboid = (lb + bh + lh) sq units

Lateral surface area of cuboid = {2(l + b)   h] sq units 

Diagonal of cuboid =   units

Unit conversion:

1 cm³ = 1 mL

1 L = 1000 cm³

1 m³ = 106 cm³ = 1000 L

With the CBSE Class 8 NCERT solutions for this Maths chapter, you can learn the way to find the surface area of cubes and cuboids too. For commonly asked chapter-specific questions and expert answers, visit the ‘Ask a doubt’ section on our study platform.

Chapter 9 - Mensuration Exercise Ex. 9.1

Compute the area of rectangular fields and find the correct answer with CBSE Class 8 Maths textbook solution. These questions are asked in the subjective section. Refer to TopperLearning’s CBSE Class 8 Maths sample papers for more insight.

Chapter 9 - Mensuration Exercise Ex. 9.2

Calculate the area of a trapezium and learn its application with TopperLearning’s CBSE Class 8 Maths textbook solutions. Use our doubt solver “Ask a doubt” if you have doubts. Clear your concerns by practising more using video lectures, MCQs, and TopperLearning’s CBSE Class 8 Maths sample papers.

Chapter 9 - Mensuration Exercise Ex. 9.3

Discover the process of computing the area of general quadrilateral polygons and special quadrilaterals accompanied by  Surface Area of Cube, Cuboid and Cylinder with TopperLearning’s CBSE Class 8 Maths textbook solutions.

Chapter 9 - Mensuration Exercise Ex. 9.4

TopperLearning’s CBSE Class 8 Maths textbook solutions helps you with a step-wise solution for calculating the Volume of Cube, Cuboid and Cylinder. These questions are most important in terms of high order thinking skills.

NCERT Mensuration Class 8 Videos

NCERT Mensuration Class 8 Revision Notes

NCERT Mensuration Class 8 Most Important Questions

NCERT Mensuration Class 8 MCQ

NCERT Mensuration Class 8 Short Answer Questions

List Of Sub Chapters

Class 8 Maths- Area And Perimeter Of Quadrilaterals

Class 8 Maths – Area Of Polygonal Regions

Class 8 Maths – Perimeter Of Polygons

Class 8 Maths – Surface Area: Cubes And Cuboids

Class 8 Maths – Volumes: Cubes And Cuboids

Class 8 Maths – Surface Area And Volume Of Cylinder

Class 8 Maths – Problems On Mensuration

NCERT Solutions for CBSE Class 8 Mathematics Chapter 10 Exponents and Powers

Enhance your Maths skills with the support of TopperLearning’s NCERT Solutions for CBSE Class 8 Mathematics Chapter 10 Exponents and Powers. Study Maths at your own pace with expert answers for all your Maths textbook exercises. TopperLearning gives you free access to all these expert answers online 24/7.

1. Large numbers can be written in shorter form using exponents.
   For example: 1000 = 103
   Here, 103 is called the exponential form of 1000.
   10the number that is being multiplied) is called the base.
   3 (number of times the same number is multiplied by itself) is called the power (or index or exponent) 
2. As the exponent increases by 1 the value becomes ten times the previous value.
3. As the exponent decreases by 1 the value becomes  the previous value.
4. For any non-zero integer ‘a’,  , where m is a natural number.
5. For a and b non-zero rational numbers, then  
6. Laws of exponents: If 'a' and 'b' are rational numbers different from zero and if x, y are positive  integers, then
   i. ax   ay = ax+y
   ii. ax   ay = ax – y
   iii. (ax)y = axy
   iv. (ab)x = ax  bx
   v. a0 = 1
   vi. (-1)odd number = -1
   vii. (-1) even number = 1

Also, understand the laws of exponents and revise the problems based on powers with negative numbers. Our NCERT textbook solutions for CBSE Class 8 Maths have you covered. For complete self-study materials, you may also want to take a look at our video lessons, solved question papers, and more.

Chapter 10 - Exponents and Powers Exercise Ex. 10.1

Revise and apply the laws of exponents on the given questions and compare your answers with TopperLearning’s CBSE Class 8 Maths textbook solutions.

Chapter 10 - Exponents and Powers Exercise Ex. 10.2

Compare numbers with very high power with smaller numbers and simplify the solutions with TopperLearning’s CBSE Class 8 Maths solutions.  Such questions are asked in the MCQ category. Hence, it is wise to refer to some TopperLearning’s extra MCQs and CBSE sample papers Class 8 for practice.

NCERT Exponents and Powers Class 8 Videos

NCERT Exponents and Powers Class 8 Revision Notes

NCERT Exponents and Powers Class 8 Most Important Questions

NCERT Exponents and Powers Class 8 MCQ

NCERT Exponents and Powers Class 8 Short Answer Questions

List Of Sub Chapters

Class 8 Maths- Exponent Notation

Class 8 Maths – Numbers In Standard Form

NCERT Solutions for CBSE Class 8 Mathematics Chapter 11 Direct and Inverse Proportions

Revise concepts from the syllabus using TopperLearning’s NCERT Solutions for CBSE Class 8 Mathematics Chapter 11 Direct and Indirect Proportions. Learn to apply the concept of direct proportion to find answers in real-life scenarios such as whether a pigment and its base are in the right proportion.

Two quantities x and y are said to be in direct proportion if whenever the value of x increases (or decreases), then the value of y increases (or decreases) in such a way that the ratio   remains constant.

Example: Work done is directly proportional to the number of men working on it.

Two quantities x and y are said to be indirect proportion if whenever the value of x increases (or decreases), then the value of y decreases (or increases) in such a way that xy remains constant.

Example: The time taken by any vehicle in covering a certain distance is inversely proportional to the speed of the car.

Map is a miniature representation of a large regions. Hence we can say that scale of a map is based   on the concept of direct variation.

Suppose A can finish a piece of work in n days. Then, work done by A in 1 day = 

When a person A completes  part of the work in one day, then A will take n days to complete the work.

In a cistern there are two pipes. The inlet is the pipe that fills the cistern and the outlet is the pipe that empties the cistern.

When an inlet fills the cistern in ‘n’ hours, then it will fill up  part of the cistern in one hour.

When an outlet empties the cistern in ‘n’ hours, then it will empty out  part of the cistern in one hour.

Multiplicative inverse of a number is called the reciprocal of a number.

With TopperLearning’s NCERT textbook solutions, learn how to solve Maths problems based on inverse proportion. To improve your Maths skills and to get a high score in your exam, use our CBSE Class 8 Maths videos, online mock tests, practice question papers etc.

Chapter 11 - Direct and Indirect proportions Exercise Ex. 11.1

Master the concept and application of Direct Proportion with TopperLearning’s elaborated study material comprising videos, MCQs, CBSE sample papers Class 8 and tests. Tally all your solutions with TopperLearning’s CBSE Class 8 Maths solutions.

Chapter 11 - Direct and Indirect proportions Exercise Ex. 11.2

CBSE Class 8 Maths textbook solution questions are asked in the subjective category for 3-4 marks. Hence, refer to TopperLearning’s extra questions and CBSE Class 8 sample papers 2020-21 for more practice.

NCERT Direct and Inverse Proportions Class 8 Videos

NCERT Direct and Inverse Proportions Class 8 Revision Notes

NCERT Direct and Inverse Proportions Class 8 Most Important Questions

NCERT Direct and Inverse Proportions Class 8 MCQ

NCERT Direct and Inverse Proportions Class 8 Short Answer Questions

Study Maths at your convenience with TopperLearning’s NCERT Solutions for CBSE Class 8 Maths Chapter 12 Factorisation. Revise the lessons on the division of algebraic expressions by going through our chapter solutions from CBSE Class 8 syllabus. Get over your fear of the concept of factorisation by practising numerous textbook solutions given by our subject experts.

1. Factorisation of an expression means writing it as a product of its factors. 
2. An irreducible factor is a factor which cannot be expressed further as a product of factors.
3. Factorisation using common factor method:
   Step 1: Find the factors of the individual terms of the given expression.
   Step 2: Find out all the common factors between the terms involved.
   (same as finding HCF of terms)
   Step 3: This common factor would be one factor of the given expression. Other factor would be the expression obtained on dividing the given expression by common factor.
4. Rearranging the given expression to a convenient form allows us to form groups leading to factorization. This is regrouping.
5. Factorisation by regrouping terms
   Step 1: Arrange the terms of the given expression in groups in such a way that all the groups have a common factor.
   Step 2: Factorise each group.
   Step 3: Take out the factor which is common to all such groups.
6. Factorisation using following identities:
   i. a² + b² + 2ab = (a + b)²
   ii. a² + b² - 2ab = (a - b)²
   iii. a² - b² = (a + b)(a - b)
   iv. x² + (a + b)x + ab = (x + a)(x + b)

Method: Express the give expression as the LHS of the identities given above by choosing suitable values of a and b. Using identities, factorise the expression as RHS.

Our study portal supports you during your exams with easy access to chapter-wise CBSE Class 8 Maths NCERT solutions any time of the day, any day of the week. So, revise your Maths chapters and be ready to excel in your exam.

Chapter 12 - Factorisation Exercise Ex. 12.1

Gain knowledge about yet another concept in CBSE Class 8 Maths that has vast applications in the higher grades. Solve problems and check your answers with TopperLearning’s CBSE Class 8 Maths textbook solutions on finding common factor and factorisation of a polynomial.

Chapter 12 - Factorisation Exercise Ex. 12.2

Factorise using identities and get the perfect solution with TopperLearning’s CBSE Class 8 Maths textbook solutions.

Chapter 12 - Factorisation Exercise Ex. 12.3

Earlier, we focused on the Multiplication of Algebraic expressions. Here, we shall look at the concept of Division of Algebraic Expressions with steps. TopperLearning’s CBSE Class 8 Maths solutions come in handy as they are detailed.

Chapter 12 - Factorisation Exercise Ex. 12.4

Evaluate your knowledge by spotting errors in the given questions and get a simplified output that can be checked thoroughly with TopperLearning’s CBSE Class 8 Maths solution. Gain a proper insight into the most important questions and go through TopperLearning’s CBSE Class 8 sample papers 2020-21.

NCERT Factorisation Class 8 Videos

NCERT Factorisation Class 8 Revision Notes

NCERT Factorisation Class 8 Most Important Questions

NCERT Factorisation Class 8 MCQ

NCERT Factorisation Class 8 Short Answer Questions

List Of Sub Chapters

Class 8 Maths- Introduction to Factorisation

Class 8 Maths – Factorisation Using Identities

Class 8 Maths – Division of Polynomials

NCERT Solutions for CBSE Class 8 Mathematics Chapter 13 Introduction to Graphs

TopperLearning’s detailed NCERT Solutions for CBSE Class 8 Maths Chapter 13 Introduction to Graphs can help you revise this chapter. Practise with our solutions and understand the correct way to plot graphs based on the given data. Observe how data can be represented on the X-axis and the Y-axis of a graph.

1. A bar graph is used to show comparison among categories.
2. A pie graph is used to compare parts of a whole.
3. A Histogram is a bar graph that shows data in intervals.
4. A line graph displays data that changes continuously over periods of time.
5. Two perpendicular number lines intersecting at point zero are called coordinate axes.
6. The point of intersection of x-axis and y-axis is called origin and is denoted by ‘O’.
7. The distance of a point from y-axis is called its x-coordinate and the distance of a point from x-axis is called its y-coordinate.
8. The two coordinates x and y taken together for a point P constitutes an ordered pair P(x,y).
9. The positions of the coordinates cannot be interchanged. Therefore P(x,y)≠Q(y,x), if x≠y.
10. The x- coordinate of every point on y-axis is zero and the y-coordinate of every point on x-axis is zero.
11. The x-coordinate of every point on the line parallel to y-axis is constant while y-coordinate of every point on the line parallel to x-axis is constant.
12. A line graph which is a whole unbroken line is called a linear graph.
13. Two quantities which vary directly can be plotted as a linear graph. Independent variable is generally taken on x axis the dependent variable is taken on y axis.
14. Steps to draw a graph:
    i. Find out the relation between y and x.
    ii. Calculate different values of y corresponding to the values of x.
    iii. Tabulate the results.
    iv. Plot the points.
    v. join the points to obtain the graph.

Revise how to construct linear graphs with our Class 8th Maths NCERT solutions. If you have any doubts related to the application of graphs, you can visit the ‘Ask a doubt’ section of our learning platform. Our experts resolve all doubts posted by students through this platform.

Chapter 13 - Introduction to Graphs Exercise Ex. 13.1

Learn how to use a bar graph to represent information and also to answer a question based on the graph. Every solution in TopperLearning’s CBSE Class 8 Maths textbook solutions is explained in detail.

Chapter 13 - Introduction to Graphs Exercise Ex. 13.2

Plot points on a graph and find answers to related to questions. Such questions are often asked in the objective section. Which you can refer to in TopperLearning’s CBSE Class 8 sample papers 2020-21. The CBSE Class 8 Maths solutions assist you when you want to check your methods of solving a problem.

Chapter 13 - Introduction to Graphs Exercise Ex. 13.3

Perform operations and present information on a linear graph and find answers to related questions. TopperLearning’s CBSE Class 8 Maths textbook solutions assist you with ideal solutions.

NCERT Introduction to Graphs Class 8 Videos

NCERT Introduction to Graphs Class 8 Revision Notes

NCERT Introduction to Graphs Class 8 Most Important Questions

NCERT Introduction to Graphs Class 8 MCQ

NCERT Introduction to Graphs Class 8 Short Answer Questions