Page 56 - Math Genius C3

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\ 01-Oct-2025 Bharat Arora Proof-10 Reader’s Sign _______________________ Date __________

Practice Time 3A

1. Subtract the following.

(a) H t O (b) H t O (c) H t O (d) H t O

9 3 7 8 6 9 6 4 3
– 4 3 2 – 5 0 2 – 3 1 1 9 3 4

– 6 4 6

(e) H t O (f) H t O (g) H t O (h) H t O

5 0 4 8 4 6 9 0 0 6 2 0
– 2 4 8 – 4 8 3 – 4 8 8 – 3 8 9

2. Find the difference by arranging the numbers in columns.

(a) 628 – 436 (b) 843 – 257 (c) 619 – 381 (d) 830 – 538
(e) 609 – 528 (f ) 576 – 348 (g) 930 – 648 (h) 400 – 178

Subtraction of 4-digit numberS

We have learnt the subtraction of 3-digit numbers without and with regrouping. The
same method is applied when we subtract 4-digit numbers without and with regrouping.
Subtraction without Regrouping

Example 1: Subtract 6578 from 9999.
Solution: Write the numbers in columns and follow the given steps: th H t O
9 9 9 9
Step 1: Subtract the ones. 9 ones – 8 ones = 1 one – 6 5 7 8

Step 2: Subtract the tens. 9 tens – 7 tens = 2 tens 3 4 2 1
Step 3: Subtract the hundreds. 9 hundreds – 5 hundreds = 4 hundreds

Step 4: Subtract the thousands. 9 thousands – 6 thousands = 3 thousands

Thus, 9999 – 6578 = 3421
Subtraction with Regrouping

Titu and Sonu live in Bhopal. They are planning a long vacation with their parents.
Titu: We plan to go to Jammu by car or by air.

Sonu: I prefer going by car. However, what would be the difference in the distance if we
travel by car and by air?

54 Mathematics-3