Page 190 - New Medley 5 Semester 1

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Example 13: Divide 16 by .
5

4 4 5 4 5
Solution: 16 ÷ = 16 × ( Reciprocal of is .)
5 4 5 4

1
= 4 × 5 = 20

Dividing a Fraction by a Whole Number

To divide a fraction by a whole number, we multiply the fraction with the
reciprocal of the whole number.

8 1
Example 14: Divide. (a) by 6 (b) 2 by 18
15 4
4
8 8 1 4 × 1 4 1
Solution: (a) ÷ 6 = × = = ( 6 × = 1)
15 15 6 15 × 3 45 6
3

1 9
(b) 2 ÷ 18 = ÷ 18
4 4

1
9 1 1 × 1 1 1
= × = = ( 18 × = 1)
4 18 4 × 2 8 18

2
Dividing a Fraction by Another Fraction

To divide a fraction by another fraction, identify Recall division fact:

dividend and divisor, then multiply the dividend Dividend ÷ Divisor
with the reciprocal of the divisor.

2 6 5 1
Example 15: Find. (a) ÷ (b) 1 ÷3
5 35 8 4

2 6 2 35
Solution: (a) ÷ = ×
5 35 5 6
6 35
( Reciprocal of the divisor is .)
35 6

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