Introduction to Algebraic Expressions

Chapter Twelve Algebraic Expression

Introduction to Algebraic Expressions

In class seven teacher wants to teach algebraic expression to the students. So, she gave the following example:

Teacher: Suppose Ram and Raghav are siblings. Their mother gives them some marbles. Suppose Ram has two marbles more than Raghav, but the exact number of marbles they both have is unknown. Only we know that Raghav has two more marbles than Ram.

If you have to express this mathematically how will you do it?

Student: We don't know the exact number of marbles Ram has. Hence, we assume that Ram has X number of marbles. Now, we know that Raghav has two more marbles than Ram.

So, it can be expressed as, X plus two.

Teacher: Good! But what is X plus two? This X plus two is the algebraic expression.

So, an algebraic expression is defined as

"The combination of numbers, variables, constants and operators like plus, minus signs"

The above example is the best example of algebraic expression in which

Now, let us see what are Constants, Variables, and Operators.

(i) Constant:

A symbol having a fixed numerical value is called a constant. Example: one, Pi equals three point fourteen etc .... are the examples of constants.