Try Now for FREE
- 1. Select your country from the
dropdown. - 2. Mobile : Enter just the mobile no. without any codes
- 3. Landline : Enter the
STD code followed by the phone no. Example 040-66979999.
CBSE - VII
Operations on Algebraic Expressions
Operations on Algebraic Expressions
We can perform arithmetic operations on algebraic expressions. To add the like terms in an algebraic expression...
Lesson Demo
We can perform arithmetic operations on algebraic expressions. To add the like terms in an algebraic expression, multiply the sum of their coefficients with their common algebraic factors. For example, let us add 
.
To subtract the like terms in an algebraic expression, multiply the difference of their coefficients with their common algebraic factors. For example, let us subtract 
from 
.
Thus, to add or subtract algebraic expressions, rearrange the terms in the sum of the given algebraic expressions, so that their like terms and constants are grouped together. While rearranging the terms, move them with the correct '+' or '–'sign before them.
Let us see this example.
Add 
and 
We know that, the terms 
are 
and 
are 
Therefore, 
Hence, the addition of 
and 
is 
.
Unlike terms remain unchanged in the sum or difference of algebraic expressions.
