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 has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.

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