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

Made by

Davneet Singh

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths and Science at Teachoo.