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Basic Math Examples
120-40120−40
Step 1
Step 1.1
Set up the subtraction problem in long subtraction format.
11 | 22 | 00 | |
-− | 44 | 00 |
Step 1.2
Subtract 00 from 00.
11 | 22 | 00 | |
-− | 44 | 00 | |
00 |
Step 1.3
Borrow 1010 from the digit in the next column to the left. Add the borrowed 1010 to 22. Reduce the number that was borrowed from by 11.
00 | 1212 | ||
1 | 2 | 0 | |
- | 4 | 0 | |
0 |
Step 1.4
Subtract 4 from 12.
0 | 12 | ||
1 | 2 | 0 | |
- | 4 | 0 | |
8 | 0 |
Step 1.5
Subtract 0 from 0.
0 | 12 | ||
1 | 2 | 0 | |
- | 4 | 0 | |
0 | 8 | 0 |
0 | 12 | ||
1 | 2 | 0 | |
- | 4 | 0 | |
0 | 8 | 0 |
Step 2
The result of 120-40 is 80.
80