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\ 10-Nov-2025 Bharat Arora Proof-8 Reader’s Sign _______________________ Date __________

4. Write in columns and subtract. Check the subtraction.
a. 3204 – 1659 b. 9596 – 6599 c. 73648 – 8769

d. 69569 – 45999 e. 65003 – 58765 f. 56321 – 19546
g. 60000 – 14963 h. 87000 – 54698

EStiMAtiNg thE diFFERENCE

Similar to the estimated sum, we can also find the estimated difference. We round off
the numbers to estimate their difference.

Example. Find the estimated difference:
a. 75 – 28 to the nearest 10 b. 342 – 168 to the nearest 100

Solution. a. T O T O b. H T O H T O
7 5 rounded 8 0 3 4 2 rounded 3 0 0

– 2 8 rounded – 3 0 – 1 6 8 rounded – 2 0 0

4 7 5 0 1 7 4 1 0 0
Actual Estimated Actual Estimated
difference difference difference difference

Exercise 2E

1. Estimate each difference by rounding numbers to the nearest 10. Also find the
actual difference.
a. 76 – 25 b. 436 – 255 c. 715 – 219 d. 555 – 333
e. 2634 – 1862 f. 8652 – 4327 g. 4253 – 3243 h. 8888 – 2222

2. Estimate each difference by rounding numbers to the nearest 100. Also find the
actual difference.
a. 436 – 258 b. 736 – 192 c. 572 – 308 d. 733 – 264

e. 3732 – 2486 f. 5024 – 1456 g. 27426 – 11548 h. 5964 – 2736

SuBtRACtioN WoRd PRoBLEMS

Example. The population of a town is 74321. If 39876 are males, find the number of
females in that town.

Solution. Total population of the town = 7 4 3 2 1
Number of males = – 3 9 8 7 6

Number of females = 3 4 4 4 5
Thus, the town has 34445 females.

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Addition and Subtraction