Let’s take some examples

#### Add 1/3 & 4/3

1/3  + 4/3

Since denominator is same,

we add numerators

= (1+ 4)/3

= 5/3

#### Subtract 6/9 from 2/9

2/9  − 6/9

Since denominator is same,

we add numerators

= (2  - 6)/9

= (-4)/9

#### Subtract 1/2 & 1/5

1/2 − 1/5

= (1 × 5 - 1 × 2)/(2 × 5)

= (5 - 2)/6

= 3/10

#### Add 1/2 & 1/3

1/2 + 1/3

= (1 × 3 + 1 × 2)/(2 × 3)

= (3 + 2)/6

= 5/6

#### Add 1/2 & (-1)/3

1/2 + ((-1)/3)

= 1/2 – 1/3

= (1 × 3 - 1 × 2)/(2 × 3)

= (3 - 2)/6

= 1/6

#### Add (-1)/2 & 1/3

(-1)/2 + 1/3

= (-1 × 3 + 1 × 2)/(2 × 3)

= (-3 + 2)/6

= (-1)/6

#### Add (-1)/2 & (-1)/3

(-1)/2 + ((-1)/3)

= (-1)/2 – 1/3

= (-1 × 3 - 1 × 2)/(2 × 3)

= (-3 - 2)/6

= (-(3 + 2))/6

= (-5)/6

Subscribe to our Youtube Channel - https://you.tube/teachoo

1. Chapter 9 Class 7 Rational Numbers
2. Concept wise
3. Addition & Subtraction of rational numbers

Addition & Subtraction of rational numbers

About the Author Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.