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Subtracting Three Digit Numbers

An interactive math lesson of subtracting three digit numbers.
Steps to follow with an example as 524 - 138 :
• Write the given numbers one below the other in such a way that hundreds, tens and one places are lined up. Draw a line below it and put the '-' (minus) sign before the second number.
H T O
5 2 4
- 1 3 8
--------------
• As digit at ones place 4 is less than 8 so borrow 1 from tens place digit so 4 becomes 14 and digit at tens place reduces by 1. New number becomes
4 --> 14 and 2 --> 1.

1 14
5 2    4
- 1    3    8
--------------
• 14 - 8 = 6 place this in ones column. Now (1 - 3 = ? ) Again borrow 1 from hundreds place. So 1 becomes 11 and 5 becomes 4.

11
4 1 14
5 2 4
- 1 3 8
------------
6
• 11- 3 = 8 place this in tens column and in hundred column there is
4 - 1 = 3.

11
4 1 14
5 2 4
- 1 3 8
--------------
3 8 6
So, 524 - 138 = 386.
___________________________________________________________
Example 1 : Subtract 658 - 472.
Solution:

14
5 4
6 5 8
- 4 7 2
--------------
1 8 6
___________________________________________________________
Example 1 : Subtract 560 - 79.
Solution:

15
4 5 10
5 6 0
- 7 9
--------------
4 8 1
______________________________________________________________
Example 3 : Subtract 256 - 39.
Solution:

4 16
2 5    6
- 3 9
--------------
2 1 7


Practice

3 8 0
- 1 6 4
--------------

6 9 0
- 3 7 1
--------------

8 6 3
- 7 7 3
--------------

5 9 8
- 3 1 9
--------------

4 3 6
- 2 7 3
--------------

8 4 6
- 1 3 8
--------------

5 4 7
- 3 6 8
--------------

8 0 1
- 2 4 6
--------------

9 3 6
- 7 5 8
--------------

6 0 6
- 5 2 7
--------------

6 9 5
- 4 6 8
--------------

6 1 7
- 2 8
--------------


Subtracting three digit numbers

2nd Grade Math

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