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Unlike fractions are those fractions where denominators are different

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

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Add 1/2 & 1/3

We use two methods to solve this

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Subtract 1/2 & 1/5

Β  Β  Β  Β  Β  Β  1/2 βˆ’ 1/5

Addition and Subtraction of Unlike Fractions - Part 2


Transcript

Adding & Subtracting Unlike FractionsUnlike fractions are those fractions where denominators are different Eg: 1/2, 1/3, 1/5, 1/8 Add 𝟏/𝟐 & 𝟏/πŸ‘ 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 ∴ 1/2 = 1/3 Thus, 1/2 + 1/3 = 3/6 + 2/6 = (3 + 2)/6 = πŸ“/πŸ” Subtract 𝟏/𝟐 & 𝟏/πŸ“ 1/2 βˆ’ 1/5 Method 1 1/2 βˆ’ 1/5 = (1 Γ— 5 βˆ’ 1 Γ— 2)/(2 Γ— 5) = (5 βˆ’ 2)/6 = πŸ‘/𝟏𝟎 Method 2 1/2 βˆ’ 1/5 Making denominators same. Common denominator. = LCM of 2 & 5 = 2 Γ— 5 = 10 ∴ 1/2 1/5 Thus, 1/2 βˆ’ 1/5 = 5/10 βˆ’ 2/10 = (5 βˆ’ 2)/10 = πŸ‘/𝟏𝟎

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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.