Page 36 - ICSE Math 5

Example 12: Subtract 4,25,178 from 7,60,085 and check your answer.
Solution: L TTh Th H T O Check: L TTh Th H T O
9 1 1 1
5 10 10 7 15 3 3 4 9 0 7
7 6 0 0 8 5
– 4 2 5 1 7 8 + 4 2 5 1 7 8

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

Finding the Missing Digits

We can find the missing digits in a problem on subtraction by considering the place values of the
digits and using the given formulae.

Difference = Minuend – Subtrahend Difference + Subtrahend = Minuend
Minuend – Difference = Subtrahend

Example 13: Find the missing digits.

TL L TTh Th H T O
9 ? 8 ? 3 ? 5

– ? 2 ? 2 0 1 ?
3 4 3 2 ? 1 3

Solution: Step 1: Look at the ones column. TL L TTh Th H T O

5 – ? = 3 9 ? 8 ? 3 ? 5

We have, 5 – 3 = 2. – ? 2 ? 2 0 1 2

So, write 2 in the blank space. 3 4 3 2 ? 1 3

Step 2: Look at the tens column. TL L TTh Th H T O

? – 1 = 1 9 ? 8 ? 3 2 5

We have, 1 + 1 = 2. – ? 2 ? 2 0 1 2

So, write 2 in the blank space. 3 4 3 2 ? 1 3

Step 3: Continue in the same manner to get all the missing digits.

TL L TTh Th H T O

9 6 8 4 3 2 5

– 6 2 5 2 0 1 2

3 4 3 2 3 1 3

26