Page 65 - Start Up Mathematics_3

= 627 (As 1 + 5 = 6)

So, 57 × 11 = 627.

EXERCISE 5.2

1. Fill in the blanks using multiplication facts.

(a) 5 × 7 = _______ × 5 (b) 11 × 8 = 8 × _______ (c) 12 × 0 = _______

(d) 19 × _______ = 19 (e) 45 × _______ = 0 (f) 1 × _______ = 16
2. Observe the pattern in the table of 12 and fill in the blanks.

1 × 12 = 12 (10 + 2) 6 × 12 = _____ (____ + ____ )

2 × 12 = 24 (20 + 4) 7 × 12 = _____ (____ + ____ )

3 × 12 = 36 (30 + 6) 8 × 12 = _____ (____ + ____ )

4 × 12 = _____ (____ + ____ ) 9 × 12 = _____ (____ + ____ )

5 × 12 = _____ (____ + ____ ) 10 × 12 = _____ (____ + ____ )

3. In each group, circle the odd one out. One is done for you.

(a) (b)
2 × 6 5 × 2 6 × 4 3 × 8

3 × 4 6 × 2 5 × 9 12 × 2

4 × 3 4 × 6

(c) 4 × 9 6 × 6 (d) 4 × 10 5 × 8

12 × 3 7 × 8 6 × 7 20 × 2

9 × 4 10 × 4

(e) (f)
9 × 2 6 × 3 9 × 10 6 × 15

2 × 8 3 × 6 18 × 5 10 × 3

1 × 18 30 × 3

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