NCERT Solutions for Class 7 Maths Chapter 12

Class 7 Maths Chapter 12 all Exercises Solution

7 Maths Chapter 12 Solutions

Class 7 Maths Chapter 12 Algebraic Expressions all four exercises solutions are given below. These are updated NCERT Solutions for 2021-2022 for the new session 2021-22.

• 7 Maths Chapter 12 All Exercises in English Medium

• 7 Maths Chapter 12 All Exercises in Hindi Medium

Class 7 Maths Exercise 12.1 and Exercise 12.2 Solution in Video

Class 7 Maths Exercise 12.1 Solution in VideoClass 7 Maths Exercise 12.2 Solution in Video

Class 7 Maths Exercise 12.3 and Exercise 12.4 Solution in Video

Class 7 Maths Exercise 12.3 Solution in VideoClass 7 Maths Exercise 12.4 Solution in Video

About NCERT Solutions for Class 7 Maths Chapter 12

In 7 Maths Chapter 12 Algebraic Expressions, the questions based on mainly algebraic identities and it applications. In this chapter we will study about a variable and a constant. A variable can take various values. Its value is not fixed. On the other hand, a constant has a fixed value. Examples of constants are: 4, 20, –127, etc. Before discussing the algebraic expression, we should know about the terms, coefficients, etc.
Basic Terms about Algebraic Expressions
1. Term: The parts of algebraic expressions which are formed separately and then added for form an algebraic 2. expressions. Such parts of an expression which are formed separately first and then added are known as terms.
Coefficient: The factors of the terms may be numerical and the others algebraic. The numerical factor is said to be the numerical coefficient or simply the coefficient of the term.
In this chapter we will learn the addition or subtractions of expression on the basis of like terms or unlike terms. Terms like monomial, binomial, trinomial or any polynomial. Finding the value of an expression given in this chapter will help you in later classes to study functions of variables.

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Important Questions on Class 7 Maths Chapter 12

If m = 2, find the value of m – 2.

Putting the value of m in m – 2 We have 2 – 2 = 0

What do you mean by like terms in Algebraic Expressions?

The terms having the same algebraic factors are called like terms.

What are unlike terms in Algebraic Expressions?

The terms having different algebraic factors are called unlike terms.

What are monomial, binomial or trinomial in Algebraic Expressions?

Expression with one term is called a ‘Monomial’.
Expression with two unlike terms is called a ‘Binomial’.
Expression with three unlike terms is called a ‘Trinomial’.

How are the mathematical operations done in algebraic expressions?

When we add (or subtract) two algebraic expressions, the like terms are added (or subtracted) and the unlike terms are written as they are.

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