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Example 5: Subtract 8999 from 9762.
Think Tank
Solution: th H t O Show the regrouping th H t O

16 15 of thousands,
8 6 5 12 hundreds, tens and
9 7 6 2 ones in the blank 6 2 3 1
circles.
– 8 9 9 9 – 2 4 4 8
0 7 6 3 3 7 8 3
Thus, the difference of 9762 and 8999 is 763.

Practice Time 3B

1. Subtract the following.
(a) th H t O (b) th H t O (c) th H t O (d) th H t O

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

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

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

2. Write in the columns and subtract.

(a) 5667 – 3994 (b) 8777 – 4997 (c) 9606 – 7397 (d) 7237 – 2655
(e) 8000 – 968 (f) 7467 – 5183 (g) 4007 – 1221 (h) 6549 – 3999

Subtraction ProPertieS

Subtracting 0

When zero is subtracted from any number, the difference is the number itself.

Examples: (a) 45 – 0 = 45 (b) 125 – 0 = 125 (c) 4326 – 0 = 4326
Subtracting 1

When 1 is subtracted from any (non-zero) number, the difference is the number just
before (predecessor) the given number.
Examples: (a) 71 – 1 = 70 (b) 128 – 1 = 127 (c) 1246 – 1 = 1245

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