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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