# Verify a - (-b) = a + b for the following values of a and b. a = 21, b = 18

By Ritesh|Updated : November 8th, 2022

Steps to Verify a - (-b) = a + b for the following values of a and b. a = 21, b = 18:

Given a = 21, b = 18

We have to verify a - (-b) = a + b

Step 1: Find the value of L.H.S for a = 21, b = 18

LHS = a - (-b)

On substituting the values of a and b

= 21 - (-18)

On simplifying we get

= 21 + 18

= 39

Step 2: Now we have to find the value of R.H.S for a = 21, b = 18

RHS = a + b

Substituting the values of and b

= 21 + 18

= 39

LHS = RHS

Therefore, a - (-b) = a + b is true for a = 21, b = 18

The act of combining two or more items is known as an addition. The process of computing the sum of two or more numbers in mathematics is called addition. It is a fundamental mathematical procedure that is frequently used in daily life. When we work with money, figure out our food bills, or figure out the time, we frequently employ addition.

Subtraction

The process of subtracting one number from another is called subtraction. The way to calculate the difference between two numbers is by using the basic arithmetic operation of subtraction, which is represented by the symbol (-).

### Rules for addition or subtraction of numbers

Following are the guidelines for adding and subtracting numbers:

1. When two positive numbers are added, the result is always positive.
2. A negative number is always added to another negative number.
3. Any positive or negative number can result from subtracting two positive numbers.
4. Any positive or negative integer can be obtained by subtracting two negative values.

Summary:

## Verify a - (-b) = a + b for the following values of a and b. a = 21, b = 18

a - (-b) = a + b is true for a = 21, b = 18. The process of calculating the sum of two or more numbers in Maths is known as an addition. It is a basic procedure of Maths that is frequently used in our daily life.