Addition and Subtraction of Unlike Fractions
Last updated at Aug. 24, 2019 by Teachoo

Unlike fractions are those fractions where denominators are different

Eg: 1/2, 1/3, 1/5, 1/8

Add
1/2
&
1/3

We use two methods to solve this

Subtract
1/2
&
1/5

1/2 − 1/5

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

Transcript

Adding & Subtracting Unlike FractionsUnlike fractions are those fractions where denominators are different
Eg: 1/2, 1/3, 1/5, 1/8
Add ๐/๐ & ๐/๐
We use two methods to solve this
Method 1
1/2 + 1/3
= (1 ร 3 + 1 ร 2)/(2 ร 3)
= (3 + 2)/6
= 5/6
Method 2
1/2 + 1/3
First, we make denominators same.
Common denominator.
= LCM of 2 & 3
= 2 ร 6
= 6
โด 1/2 =
1/3
Thus,
1/2 + 1/3
= 3/6 + 2/6
= (3 + 2)/6
= ๐/๐
Subtract ๐/๐ & ๐/๐
1/2 โ 1/5
Method 1
1/2 โ 1/5
= (1 ร 5 โ 1 ร 2)/(2 ร 5)
= (5 โ 2)/6
= ๐/๐๐
Method 2
1/2 โ 1/5
Making denominators same.
Common denominator.
= LCM of 2 & 5
= 2 ร 5
= 10
โด 1/2
1/5
Thus,
1/2 โ 1/5
= 5/10 โ 2/10
= (5 โ 2)/10
= ๐/๐๐

Show More