Page 50 - SM Class 5 Inner.cdr

3 5
Example 5 : Multiply 3 by
8 9

Solution : First convert mixed fraction into improper fraction.

´
+
3 3 8 3 24 + 3 27
So, 3 = = =
8 8 8 8
27 5
Now ´
8 9
27 5 15
Product is : ´ =
8 91 3

(Multiply numerator with numerator and denominator with denominator)

E xercise 4.3

1. Multiply the following :

5 3 5 1
a. ´ 7 b. ´ 48 c. ´ 0 d. ´ 5
7 8 8 35

2 7 3 1 4
e. ´ 2 f. ´ 4 g. ´ 4 h. ´ ´ 1
5 8 7 2 5

2. Find the product of :
7 2 7 1
a. 1 ´ 6 b. 1 ´ 10 c. 1 ´ 1 d. 4 ´ 3
8 15 9 9

4 3 15 3 14
e. 2 ´ 5 f. 2 ´ g. 4 ´
5 5 26 7 29

Reciprocal of Fraction

Look at these examples :

´
1 1 3 3
Example 6 : (i) ´ 3 = = = 1
3 3 3
´
1 1 8 8
(ii) ´ 8 = = = 1
8 8 8
´
7 9 7 9 1
(iii) ´ = = = 1
´
9 7 9 7 1
´
11 5 11 5 55
(iv) ´ = = = 1
´
5 11 5 11 55

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