Page 64 - Math Genius C3

E:\Working\Orange_Education\Math_Genius_3\Open_Files\CHAP_03
\ 01-Oct-2025 Bharat Arora Proof-10 Reader’s Sign _______________________ Date __________

Example 2: Subtract 1408 from 4637 and check your answer.

Solution: Subtraction Checking

th H t O th H t O

2 17 1
4 6 3 7 3 2 2 9
– 1 4 0 8 + 1 4 0 8

3 2 2 9 4 6 3 7

Thus, the subtraction is correct.

Think Tank Critical Thinking
1. By how much does one thousand exceed 697?
2. Find the number which when added to 4758 gives 6002.

Practice time 3e

1. Solve the following.

(a) 3231 – 1965 + 987 (b) 4589 – 3256 + 1634

(c) 2634 + 1687 – 1622 – 834 (d) 8532 – 1986 + 3756 – 5288
(e) 4702 + 8329 – 9561 – 3385 (f) 9987 – 9522 + 7008 – 832

2. Find the difference and then check the answer.

(a) 574 – 283 (b) 483 – 196 (c) 4326 – 1564 (d) 9785 – 3702
3. Subtract the sum of 2370 and 4599 from 8220.

4. Subtract the difference of 4980 and 3895 from 6910.

5. Subtract 6998 from the sum of 5334 and 4653.

word ProblemS

Example 1: Piku's fish pond has a lot of fish. Piku added 292 more fish and now there

are 689 fish in the pond. How many fish were there in the pond at the beginning?
Solution: H t O
5 18
Total number of fish in the pond = 6 8 9
Number of fish Piku added = – 2 9 2
Number of fish in the pond at the beginning = 3 9 7

Thus, there were 397 fish in the pond at the beginning.

62 Mathematics-3