Ex 2.1, 7 (a) - Chapter 2 Class 7 Fractions and Decimals

Last updated at Dec. 16, 2024 by

Ex 2.1, 7 - Find: (a) 1/2 of (i) 2 3/4 - Fractions and Decimals - Ex 2.1

part 2 - Ex 2.1, 7 (a) - Ex 2.1 - Serial order wise - Chapter 2 Class 7 Fractions and Decimals
part 3 - Ex 2.1, 7 (a) - Ex 2.1 - Serial order wise - Chapter 2 Class 7 Fractions and Decimals
part 4 - Ex 2.1, 7 (a) - Ex 2.1 - Serial order wise - Chapter 2 Class 7 Fractions and Decimals

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Ex 2.1, 7 Find: (a) 1/2 of (i) 2 3/4 1/2 × 2 3/4 = 1/2 × 2 3/4 = 1/2 × (2+3/4) = 1/2 × ((2 × 4 + 3)/4) = 1/2 × ((8 + 3)/4) = 𝟏/𝟐 × 𝟏𝟏/𝟒 = 11/(2 × 4) = 11/8 Converting to mixed fraction = 1 𝟑/𝟖 Ex 2.1, 7 Find: (a) 1/2 of (ii) 4 2/91/2 × 4 2/9 = 1/2 × 4 2/9 = 1/2 × (4+2/9) = 1/2 × ((4 × 9 + 2)/9) = 1/2 × ((36 + 2)/9) = 𝟏/𝟐 × 𝟑𝟖/𝟗 = 38/(2 × 9) = 19/9 Converting to mixed fraction = 2 𝟏/𝟗 Ex 2.1, 7 Find: (b) 5/8 of (i) 3 5/65/8 × 3 5/6 = 5/8 × 3 5/6 = 𝟓/𝟖 × (𝟑+𝟓/𝟔) = 5/8 × ((3 × 6 + 5)/4) = 5/8× ((18 + 5)/4) = 𝟓/𝟖 × 𝟐𝟑/𝟔 = (5 × 23)/(8 × 16) = 115/48 Converting to mixed fraction = 2 𝟏𝟗/𝟒𝟖

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Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science and Computer Science at Teachoo