Page 29 - Start Up Mathematics_5

Subtraction (with borrowing)

Example 8: Subtract 57,68,435 from 90,26,154 and check your answer.

Solution: TL L TTh Th H T O
8 10 9 1 11 5 15 11 4 14
9 0 2 6 1 5 4
– 5 7 6 8 4 3 5

3 2 5 7 7 1 9

Checking
TL L TTh Th H T O
1 1 1 1 1
3 2 5 7 7 1 9
+ 5 7 6 8 4 3 5

9 0 2 6 1 5 4

So, 90,26,154 – 57,68,435 = 32,57,719.
Example 9: Subtract 28,34,79,899 from 72,15,08,346.

Solution: TC C TL L TTh Th H T O

6 1 11 11 4 10 9 17 12 3 13 16
7 2 1 5 0 7 8 2 3 4 6
– 2 8 3 4 7 9 8 9 9
4 3 8 0 2 8 4 4 7

So, 72,15,08,346 – 28,34,79,899 = 43,80,28,447.
Example 10: Find the missing digits.

TL L TTh Th H T O
9 ? 8 ? 3 ? 5
– ? 2 ? 2 0 1 ? Remember

3 4 3 2 ? 1 3 • Minuend = Difference +
Subtrahend
TL L TTh Th H T O
Solution: • Subtrahend = Minuend –
9 6 8 4 3 2 5 Difference

– 6 2 5 2 0 1 2
3 4 3 2 3 1 3

Example 11: From the sum of 3,02,56,175 and 94,853, subtract 15,40,217.

Solution: C TL L TTh Th H T O
1
1
1
1
3 0 2 5 6 1 7 5
+ 9 4 8 5 3
3 0 3 5 1 0 2 8

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