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Example 3: Subtract 256 from 489.

Solution: Step 1 Step 2 Step 3
H T O H T O H T O

4 8 9 4 8 9 4 8 9

– 2 5 6 – 2 5 6 – 2 5 6
3 3 3 2 3 3

So, 489 – 256 = 233.

Exercise 3.1

1. Subtract the given numbers.
(a) H T O (b) H T O (c) H T O

3 7 4 1 8 7 9 3 6
– 2 1 – 4 3 – 1 2

(d) H T O (e) H T O (f) H T O

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

(g) H T O (h) H T O (i) H T O
4 2 1 8 5 2 3 3 1

– 3 2 1 – 3 1 0 – 2 1 1

2. Find the difference.

(a) 276 – 54 = (b) 198 – 65 = (c) 189 – 43 =

(d) 749 – 27 = (e) 677 – 31 = (f) 354 – 120 =

(g) 178 – 108 = (h) 498 – 136 = (i) 665 – 242 =

(j) 737 – 405 = (k) 843 – 722 = (l) 692 – 251 =

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