Page 73 - Revised Maths Wisdom Class - 3

Multi plicati on 71

Exercise 5F

1 Multiply.
(a) Th H T O (b) Th H T O (c) Th H T O

1 2 3 2 4 6 2 1 4
× 1 2 × 1 3 × 2 3

+ + +

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

2 1 6 4 1 5 3 5 0
× 3 5 × 2 2 × 1 7

+ + +

2 Solve the following.

(a) 187 × 24 (b) 316 × 15 (c) 144 × 44 (d) 166 × 12

(e) 225 × 13 (f) 323 × 26 (g) 510 × 39 (h) 629 × 85

Word Problemsord Problems
W

Let's Try
Th H T O
Example 1: A book costs ` 53. Find the cost of 20 such books.
5 3
Solution: Cost of 1 book = ` 53 × 2 0

Cost of 20 books = ` 53 × 20 0 0

= ` 53 × 2 × 10 = ` 1060 1 0 6 0

Hence, cost of 20 such books is ` 1060. 1 0 6 0

Example 2: There are 6 wheels in a bus. How many wheels will there be in 235 such
buses? Th H T O
Solution: Number of wheels in 1 bus = 6 2 3 5

Number of wheels in 235 buses = 235 × 6 = 1410 × 6
Hence, 235 buses will have 1410 wheels. 1 4 1 0