Page 48 - Fun with Mathematics 2

ORDER IN MULTIPLICATION

In multiplication, we can change the order of the numbers being multiplied.

The product remains the same.

8 × 7 = 56 or 7 × 8 = 56

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7 × 8 × 9 = 50 or 9 × 7 × 8 = 50 or 8 × 9 × 7 = 50 4
ROLE OF 0 AND 1 IN MULTIPLICATION

The product of 1 and a number is the number itself.

1 × 9 = 9 15 × 1 = 15

The product of 0 and a number is always 0.

0 × 7 = 0 13 × 0 = 0

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Write the missing number in the box. One has been done for you.

(a) 7 × 4 = 4 × 7 = 28 (b) 7 × = 5 × 7 =

(c) 8 × = 9 × 8 = (d) 9 × 7 = × 9 =

(e) 6 × 9 = 9 × = (f) 7 × 0 = × 7 =

(g) 8 × = 4 × 8 = (h) 3 × = 15 × =

(i) 4 × = 11 × = (j) 9 × = 13 × =

5 Multiply the following.

(a) 1 × 2 = _________ (b) 3 × 0 = _________

(c) 0 × 5 = _________ (d) 9 × 1 = _________

(e) 7 × 0 = _________ (f) 8 × 1 = _________

(g) 1 × 10 = _________ (h) 11 × 0 = _________

(i) 0 × 13 = _________ (j) 12 × 0 = _________
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(k) 1 × 1 = _________ (l) 15 × 0 = _________

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