Page 55 - Start Up Mathematics_3

Example 8: Find the missing digits and check your answer.

Th H T O

? 7 4 1

– 2 5 3 ?

7 ? ? 5
Checking
Solution: Th H T O Th H T O

9 7 3 4 11 1 7 2 1 0 5 ← Difference

– 2 5 3 6 + 2 5 3 6 ← Subtrahend

7 2 0 5 9 7 4 1 ← Minuend

EXERCISE 4.3

1. Subtract and check your answer.

Th H T O Check Th H T O Check
(a) (b)
8 8 7 4 9 3 2 4

– 3 2 1 0 – 6 7 2 8

Th H T O Check Th H T O Check
(c) 8 6 6 8 (d) 7 6 5 2

– 4 5 0 7 – 4 2 3 0

2. Subtract and check your answer.

(a) 4875 from 6987 (b) 6097 from 7518
(c) 4754 from 6923 (d) 3186 from 4521

3. Find the missing digits.

Th H T O Th H T O Th H T O
(a) (b) (c)
4 6 ? 3 ? 8 ? 6 8 5 3 4

– 1 ? 5 0 – 3 5 1 ? – ? 2 ? 6

? 4 4 ? 4 ? 3 4 3 ? 5 ?

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