Page 116 - Mathematics_Std_4

Example 3

Use the equal sign (=) to recognise equivalent fractions from

the following list:
FOR ONLINE READING ONLY
8 2 4 18
, , ,
18 5 9 45

Solution

Relate fractions by multiplying the fraction with a smaller

denominator by a fraction with the same numerator and
denominator as follows:
2 = 2 × 9 = 18

5 5 9 45
4 = 4 × 2 = 8

9 9 2 18

Therefore, 2 = 18 and 4 = 8 .
5 45 9 18

Exercise 1

1. For each of the following fractions, list other three fractions
which are equal.

(a) 1 (b) 1 (c) 2
7 11 9

(d) 3 (e) 1 (f) 2
15 4 3

2. In each sequence, fill in the missing fractions:

(a) 12 , __, 4 . (b) 1 , 2 , __, 4 .
,
4 8 16 8 16 32

(c) 3 , __, 9 , __. (d) 3 , __, 9 .
5 15 16 48

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MATHEMATICS STD 4 PB 2024.indd 109 06/11/2024 17:17:28