# Ex 7.4, 8 - Chapter 7 Class 6 Fractions

Last updated at July 6, 2018 by Teachoo

Last updated at July 6, 2018 by Teachoo

Transcript

Ex 7.4 ,7Find answers to the following. Write and indicate how you solved them. (a) Is 5/9 equal to 4/5? 5/9 & 4/5 To check if numbers are equal, we make their denominators equal Common denominator = L.C.M of 5 & 9 = 3 × 3 × 5 = 45 So, 5/9 = 4/5 = Since 25/45 ≠ 36/45 ∴ 5/9 ≠4/5 So, they are not equal. Ex 7.4 ,7 Find answers to the following. Write and indicate how you solved them.(b) Is 9/16 equal to 5/9 ? 9/16 & 5/9 To check if numbers are equal, we make their denominators equal Common denominator = L.C.M of 16 & 9 = 2 × 2 × 2 × 2 × 3 × 3 = 144 So, 9/16 = 5/9 = Since 81/144 ≠ 80/144 ∴ 9/16 ≠5/9 So, they are not equal. Ex 7.4 ,7 Find answers to the following. Write and indicate how you solved them. (c) Is 4/5 equal to 16/20? 4/5 & 16/20 To check if numbers are equal, we make their denominators equal Common denominator = L.C.M of 5 & 20 = 2 × 2 × 5 = 20 So, 4/5 = 16/20 Since 16/20 = 16/20 ∴ 16/20 = 4/5 So, they are equal. Ex 7.4 ,7 Find answers to the following. Write and indicate how you solved them.(d) Is 1/15 equal to 4/30 ? 1/15 & 4/30 To check if they are equal, we try to make their denominators equal Common denominator = L.C.M of 15 & 30 = 2 × 3 × 5 = 30 So, 1/15 = 4/30 Since 4/30 ≠ 2/30 ∴ 4/30 ≠1/15 So, they are not equal.

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