Page 63 - Viva

• When a number is multiplied by 1, the product is the number itself.

For example, 11 × 1 = 11 or 1 × 11 = 11.
• When a number is multiplied by 0, the product is always 0.

For example, 9 × 0 = 0 and 12 × 0 = 0.

Exercise 4.5

1. Multiply the given numbers.
(a) 6 0 (b) 3 3 (c) 4 2

× 4 × 8 × 9

(d) 5 5 (e) 4 7 (f) 2 3

× 6 × 5 × 7

(g) 3 2 (h) 1 5 (i) 2 4

× 7 × 9 × 3

(j) 4 6 (k) 1 4 (l) 3 2

× 2 × 8 × 6

2. Find the product.

(a) 24 × 2 (b) 19 × 3 (c) 28 × 4 (d) 34 × 5
(e) 16 × 7 (f) 45 × 4 (g) 23 × 6 (h) 17 × 7
(i) 10 × 9 (j) 22 × 8 (k) 14 × 6 (l) 42 × 5

Mental Maths
Fill in the boxes using multiplication facts.

(a) × 7 = 7 × 3 = (b) 6 × = 7 × 6 =
(c) × 5 = × 7 = 35 (d) 8 × = 4 × =

(e) 8 × = 6 × = (f) × 9 = 9 × = 36
(g) 9 × 7 = × 9 = (h) 3 × = × = 24

(i) 10 × = 2 × = (j) 3 × = 10 × = 30

53