Page 49 - Fun with Mathematics 2

MULTIPLYING A 2-DIGIT NUMBER BY A 1-DIGIT NUMBER

Multiply 27 by 6.

Step 1. Multiply the ones digits.
T O
4
4
4 7 × 6 = 2 = tens + 2 ones
2 7 Write 2 under the ones (O) column and carry over
× 6 4 tens to the tens (T) column.

1 6 2 Step 2. Multiply the tens digits.
2 × 6 = 12

4
Add all the tens: 12 tens + tens = 16 tens
Write 16 under the tens column.

The product of 27 and 6 is 162.

6 Multiply the following.

(a) T O (b) T O (c) T O (d) T O

9 2 2 6 2 5 4 3
× 1 × 2 × 3 × 2

(e) T O (f) T O (g) T O (h) T O
2 7 9 8 7 9 6 3

× 4 × 6 × 7 × 8

7 Write in vertical form and multiply.

4
4
(a) 12 × 2 (b) 21 × 3 (c) 2 × 4 (d) 3 × 5
T O T O T O T O

× × × ×

49