Page 62 - Viva
P. 62
(g) 3 1 (h) 1 0 (i) 2 1
× 6 × 5 × 3
(j) 3 2 (k) 3 1 (l) 4 3
× 3 × 8 × 2
2. Find the product.
(a) 31 × 9 (b) 42 × 2 (c) 21 × 7 (d) 11 × 5
(e) 12 × 4 (f) 10 × 9 (g) 23 × 3 (h) 24 × 2
(i) 33 × 3 (j) 14 × 2 (k) 32 × 6 (l) 41 × 8
Multiplication of a 2-Digit Number by a 1-Digit Number (with carry over)
Look at the following example.
Example 8: Multiply 54 by 8.
Solution: Step 1: Multiply the digit at the ones place by 8. T O
3
8 × 4 = 32 5 4
32 is a 2-digit number. Write 2 under the × 8
ones place and carry over 3 to the tens 2
place.
Step 2: Multiply the digit at the tens place by 8 H T O
and add the carried over number to the 4 3
5 4
product.
8 × 5 = 40 and 40 + 3 (carried over) = 43 × 8
Write 3 under the tens place and carry over 4 3 2
to the hundreds place.
H T O
4 3
Step 3: Write the carried over digit under the hundreds 5 4
place as it is. × 8
So, 54 × 8 = 432. 4 3 2
Multiplication Facts
• Two or more numbers can be multiplied in any order. Their product always remains
the same.
For example, 6 × 18 = 108 and 18 × 6 = 108.
52