Ex 7.4, 7 - 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 ,7 Find 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.
Comparing fractions
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