CBSE Revision Notes

Direct and Inverse Proportions Class 8 Maths Notes – Chapter 13

When two variables change in the same sense i.e as one amount increases, the other amount also increases at the same rate it is called direct proportionality. When two variables such as x and y are given, y is directly proportional to x if there is non zero constant k. The constant ratio is called constant of proportionality or proportionality constant. Please refer Direct and Inverse Proportions Class 8 Notes for more revision notes.

Exponents and Powers Class 8 Notes: Chapter 12

Exponents are numbers which indicate how many times multiplication has to be done to a number to get the desired result. An exponent is a simple but powerful tool and is basically written above the base number on the right side. Usually, an exponent or power can either be positive or negative. Negative power is quite similar to the positive power of an exponent. The only difference is that in negative power the value of the expression is the correlative of the value obtained with a positive number. Please refer Exponents and Powers Class 8 Notes for more revision notes.

Mensuration Class 8 Notes- Chapter 11

Mensuration is a branch of mathematics which mainly deals with the study of different kinds of Geometrical shapes along with its area, length, volume and perimeters. It is completely based on the application of both algebraic equations and geometric calculations. The results obtained by the Mensuration are considered very accurate. Please refer Mensuration Class 8 Notes for more revision notes.

Visualising Solid Shapes Class 8 Notes: Chapter 10

Any shape that occupies space is called a 3-D shape. These shapes have three dimensions, i.e., height, length, and breadth. Most of the time 3-D shapes look different from different positions, which are, front view, side view and top view. Examples include cylinder, sphere, cube, cuboid, and cone. Please refer Visualising Solid Shapes Class 8 Notes for more revision notes.

Algebraic Expressions and Identities Class 8 Notes: Chapter 9

Algebraic expressions are nothing but expressions that usually contain constants, variables, and operations like addition, subtraction, multiplication, division, etc by an exponent which is a rational number. For example; x + 3, 2y – 5, 3×2, 4xy + 7. Please refer Algebraic Expressions and Identities Class 8 Notes for more revision notes.

Comparing Quantities Class 8 Notes: Chapter 8

Comparing Quantities Class 8 Notes given here has been carefully put together by experts to help students understand all the concepts given in chapter 8 clearly and at the same time allow them to practice sums effectively. The notes are further designed to help students complete timely revisions and score better marks in the exams.

Cubes and Cube Roots Class 8 Notes: Chapter 7

A cube is a three-dimensional figure consisting of six square sides which are all equal. The square faces are joined along their edges. Similarly, a cuboid whose height, length and breadth are equal in measurement is termed as a cube.

Perfect cubes or Cube number is a number which is the product of three same numbers. For example, the cube number of 2 will be 2 x 2 x 2 = 8. Therefore, 8 is a cube number. Please refer Cubes and Cube Roots Class 8 Notes for more revision notes.

Squares and Square Roots Class 8 Notes: Chapter 6

A square of a number is the product of some number with itself. For example, take any natural number, let’s say m and express it as n2. Here n is a natural number and thus m can be labelled as a square number. The other name for square numbers is perfect squares. Please refer Squares and Square Roots Class 8 Notes for more revision notes.

Data Handling Class 8 Notes- Chapter 5

What is Data handling?
Data handling is referred to the procedure done to organize the information provided in order to perform mathematical operations on them.

There are various components of data, we will be seeing those below:
Raw Data– If the information which is provided is in an unorganized manner, then it is referred to as raw data. The organization of data is very important in order to have meaningful interference. The raw data can be represented properly with the help of grouped frequency distribution.
Frequency– The value which we need to calculate the operations can exist multiple times which is known as frequency. Please refer Data Handling Class 8 Notes for more revision notes.

Practical Geometry Class 8 Notes- Chapter 4

By understanding the concepts used in CBSE Solutions for Class 8, students will be able to clear all their doubts related to “Practical Geometry”. These solutions are prepared by subject matter experts at LearnCBSE describing the complete method of solving problems. Please refer Practical Geometry Class 8 Notes for more revision notes.