Page 45 - ICSE Math 4

2. Find the diff erence of the following numbers. Also, check your answer.
(a) 6,213 – 4,103 (b) 3,254 – 1,052 (c) 7,836 – 4,915 (d) 8,906 – 984

3. Find the missing digits.
(a) Th H T O (b) Th H T O (c) Th H T O

5 1 3 ? 8 7 ? 8 7 4 3 6

– ? 1 ? 4 – ? ? 6 5 – ? 2 4 9

3 ? 2 2 6 2 3 ? 5 ? 8 ?

4. Subtract the following using es ma on method by rounding off each number to
the nearest 1,000. Verify the result by fi nding the actual value.

(a) 3,742 from 6,183 (b) 5,216 from 8,479

(c) 2,807 from 5,731 (d) 1,775 from 3,120

Solving Word Problems

Example 7: A train carried 3,499 passengers on the fi rst day and 4,659 passengers on the
second day. How many more passengers did in the train carry on the second
day?

Solu on: Number of passengers the train carried on the second day y 5 15
4 6 5 9
= 4,659
– 3 4 9 9
Number of passengers the train carried on the fi rst day
1 1 6 0
= 3,499

Number of more passengers train carried on the second day
= 4,659 – 3,499 = 1,160

So, the train carried 1,160 more passengers on the second day.

Example 8: The sum of two numbers is 5,437. If one number is 2,275, what is the other
number?
Solu on: Sum of two numbers = 5,437
3 13
One number = 2,275 5 4 3 7

Other number = Sum – Given number – 2 2 7 5
= 5,437 – 2,275 = 3,162 3 1 6 2

So, the other number is 3,162.

Framing Word Problems

For a given subtrac on fact, we frame word problems in the same manner as we do it for
an addi on fact.

35