Page 46 - Start Up Mathematics_4

Subtraction of Numbers (with borrowing or regrouping)

Look at the given examples to see how to subtract large numbers with borrowing.

Example 4: Subtract 32,179 from 61,452.

Solution: TTh Th H T O

6 1 4 4 5 12 2 Step 1: Subtract the ones.
– 3 2 1 7 9 But, 2 – 9 is not possible.
Borrow 1 ten or 10 ones from the tens
3 place and add it to 2 ones.

10 ones + 2 ones = 12 ones
Thus, 12 – 9 = 3.

TTh Th H T O
14 Step 2: Subtract the remaining tens.
6 1 3 4 4 5 12 2 But, 4 – 7 is not possible.

– 3 2 1 7 9 Borrow 1 hundred or 10 tens from the
hundreds place and add it to 4 tens.
7 3
10 tens + 4 tens = 14 tens

Thus, 14 – 7 = 7.

TTh Th H T O

14 Step 3: Subtract the remaining hundreds.
6 1 3 4 4 5 12 2 3 – 1 = 2

– 3 2 1 7 9

2 7 3

TTh Th H T O

14 Step 4: Subtract the thousands.
5 6 11 1 3 4 4 5 12 2 But, 1 – 2 is not possible.

– 3 2 1 7 9 Borrow 1 ten thousand from the ten
thousands place and add it to
9 2 7 3
1 thousand.
10 thousands + 1 thousand =
11 thousands
Thus, 11 – 2 = 9.

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