Page 92 - Arithmetic

FOR ONLINE USE ONLY
DO NOT DUPLICATE

Subtracting numbers vertically by

FOR ONLINE USE ONLY
regrouping

Example

7 2
_
3 8

3 4

Steps

7 2
_
1. Subtract the ones, but 2 – 8 3 8
is impossible.

2. Take 1 tens from the group of 7 tens.
6 12
You remain with 6 tens. The group 7 2
of ones become 10 + 2 = 12 _
3 8

6 12
3. Subtract the group of ones, _
7 2
12 – 8 = 4. Write 4 in the ones 3 8
place. 4

6 12
4. Subtract tens, 6 – 3 = 3. 7 2
Write 3 in the tens place. _
3 8
3 4

The answer is 34

85
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Ministry of Education, Science and Technology
Mathematics STD 1.indd 85 03/08/2019 11:18