Page 36 - Fun with Mathematics 2

3-DIGIT SUBTRACTION (WITH REGROUPING)

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Subtract 138 from 56.

Step 1. We cannot subtract 8 from 6 in the ones (O) column.
H T O So, we borrow 1 ten from the tens (T) column.
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16
4 5 6 Now, we have 1 ten + 6 ones
– 1 3 8 = 16 ones under the ones (O) column.
16 ones – 8 ones = 8 ones
3 1 8 Write 8 under the ones (O) column.
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Step 2. In the tens (T) column, we are left with tens.
Subtract the digits under the tens (T) column.
4 tens – 3 tens = 1 ten
Write 1 under the tens (T) column.

Step 3. Subtract the digits under the hundreds (H) column.
4 hundreds – 1 hundred = 3 hundreds
Write 3 under the hundreds (H) column.
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The difference between 56 and 138 is 318.

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Find the difference.

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

8 0 4 3 6 4 3 0 2 4 1 8

– 9 7 – 2 7 5 – 1 9 3 – 3 6 9

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

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

(i) H T O (j) H T O (k) H T O (l) H T O

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

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