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Basic Math Examples
100-45100−45
Step 1
Step 1.1
Set up the subtraction problem in long subtraction format.
| 11 | 00 | 00 | |
| -− | 44 | 55 |
Step 1.2
Borrow 1010 from the digit in the next column to the left. Add the borrowed 1010 to 00. Reduce the number that was borrowed from by 11.
| -1−1 | 1010 | ||
| 11 | 0 | 0 | |
| - | 4 | 5 |
Step 1.3
Subtract 5 from 10.
| -1 | 10 | ||
| 1 | 0 | 0 | |
| - | 4 | 5 | |
| 5 |
Step 1.4
Borrow 10 from the digit in the next column to the left. Add the borrowed 10 to -1. Reduce the number that was borrowed from by 1.
| 0 | 9 | 10 | |
| 1 | 0 | 0 | |
| - | 4 | 5 | |
| 5 |
Step 1.5
Subtract 4 from 9.
| 0 | 9 | 10 | |
| 1 | 0 | 0 | |
| - | 4 | 5 | |
| 5 | 5 |
Step 1.6
Subtract 0 from 0.
| 0 | 9 | 10 | |
| 1 | 0 | 0 | |
| - | 4 | 5 | |
| 0 | 5 | 5 |
| 0 | 9 | 10 | |
| 1 | 0 | 0 | |
| - | 4 | 5 | |
| 0 | 5 | 5 |
Step 2
The result of 100-45 is 55.
55