Page 38 - Start Up Mathematics_3

3. A number can be written as the sum of two numbers in many different ways.

For example, 1100 can be written in the following ways.

1000 + 100

950 + 150 500 + 600

900 + 200 1100 780 + 320

650 + 450 700 + 400
800 + 300

EXERCISE 3.2

1. Find the following sums.

Th H T O Th H T O Th H T O
(a) (b) (c)
3 8 6 3 6 7 0 6 5 9 3 7
+ 4 9 7 8 + 1 1 9 5 + 2 4 9 8

Th H T O TTh Th H T O TTh Th H T O
(d) (e) (f)
7 9 8 7 6 6 6 6 7 8 7 1

+ 1 5 3 2 + 9 8 7 6 + 3 2 6 8

2. Add.
(a) 3469 + 1829 (b) 4262 + 3555 (c) 6148 + 8790 (d) 7262 + 3198

3. Find the following sums.

Th H T O Th H T O TTh Th H T O
(a) 2 6 8 5 (b) 2 6 1 7 (c) 6 3 3 3

1 3 4 0 3 8 7 2 8 7 6 0

+ 2 1 3 9 + 2 6 4 3 + 5 2 4 9

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