Page 40 - Math Skill - 4

38 Maths

Exercise 3.1

1. Find the following products.

(a) TTh Th H T O (b) L TTh Th H T O (c) L TTh Th H T O
1 2 8 3 6 0 1 2 2 4 8 7
× 3 4 × 9 3 × 6 4

(d) L TTh Th H T O (e) L TTh Th H T O (f) L TTh Th H T O
2 3 8 4 2 3 7 8
1 4 7 8
× 3 1 9 × 1 2 9 × 2 6 3

2. Multiply:
(a) 1398 by 62 (b) 1278 by 38 (c) 1988 by 28

(d) 3789 by 309 (e) 2684 by 168 (f) 3489 by 804
3. Multiply seven hundred sixty nine by three hundred twenty two.

4. Multiply one thousand six hundred forty two by eight hundred four.

5. Find the product of the following.
(a) 63 × 4 × 19 (b) 68 × 2 × 14
(c) 58 × 14 × 321 (d) 9 × 83 × 140

Properties of Multiplication

1. We can multiply the given numbers in any order. For example,
37 × 29 = 1073 and 29 × 37 = 1073
Hence, 37 × 29 = 29 × 37 = 1073

Th H T O Th H T O Challenge
3 7 2 9

× 2 9 × 3 7 I’m a mathematical operation that
makes number grow, repeated
3 3 3 2 0 3 addition, as may of you know. Two
+ 7 4 × + 8 7 × numbers I always combine and the

1 0 7 3 1 0 7 3 product us oh-so-time what am I?