Page 71 - Revised Maths Wisdom Class - 3

Multi plicati on 69

Step-3: Add the two numbers in both the rows.

48 + 720 = 768

Thus, 24 × 32 = 768

Example 2: Multiply 63 by 45.

Solution: First of all we arrange the numbers as per their place values and follow
these steps: Th H T O

6 3
Step-1: First multiply 63 to 5 ones. × 4 5

63 × 5 ones = 63 × 5 = 315 3 1 5
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+ 2 5 2 0
Write 315 in the fi rst row.
2 8 3 5
Step-2: Next multiply 63 by 4 tens.
RIDDLE
RIDDLE
63 × 4 tens = 63 × 40 = 2520
I’m a mathemati cal operator that makes
Write 2520 in the second row. number grow.

Step-3: Add the two numbers in both the rows. Repeated additi on, as many of you know.
Two numbers I always combine,
315 + 2520 = 2835
And the product is oh-so-fi ne.
Thus, 63 × 45 = 2835 What am I?

Exercise 5E

1 Multiply.

(a) Th H T O (b) Th H T O (c) Th H T O

8 4 6 3 1 2
× 2 2 × 3 5 × 1 2

+ + +

(d) Th H T O (e) Th H T O (f) Th H T O

3 8 3 5 4 7
× 1 4 × 1 9 × 7 4

+ + +