Page 147 - Start Up Mathematics_3

Example 7: Subtract the sum of ` 16.22 and ` 31.05 from ` 78.63.

Solution: Add (Sum) Subtract

` p ` p
1 6 2 2 5 13
7 8 6 3
+ 3 1 0 5
– 4 7 2 7
4 7 2 7
3 1 3 6

Answer: ` 31.36

EXERCISE 10.2

1. Add the following.

` p ` p ` p
(a) (b) (c)
2 2 3 1 8 2 5 6 2 7 5 3 5 6 0

+ 3 4 2 3 0 + 5 3 8 9 0 2 9 4 2

+ 8 2 7

` p ` p ` p

(d) 1 7 5 3 0 (e) 7 1 2 5 0 (f) 8 5 1 4 5

3 2 6 1 9 4 2 9 7 5 7 2 7 3 2

+ 9 3 4 6 7 + 2 4 5 3 8 + 8 5 2 0

2. Subtract the following.
` p ` p ` p
(a) 6 4 3 5 (b) 4 3 8 2 0 (c) 2 5 6 2 7

– 9 2 4 – 2 1 5 4 5 – 1 2 3 8 4

` p ` p ` p
(d) 7 6 4 3 (e) 7 4 8 6 2 (f) 9 1 9 3 4

– 2 8 3 9 – 9 9 5 0 – 7 1 2 5 6

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