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Basic Math Examples
100-71100−71
Step 1
Step 1.1
Set up the subtraction problem in long subtraction format.
11 | 00 | 00 | |
-− | 77 | 11 |
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 | |
- | 7 | 1 |
Step 1.3
Subtract 1 from 10.
-1 | 10 | ||
1 | 0 | 0 | |
- | 7 | 1 | |
9 |
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 | |
- | 7 | 1 | |
9 |
Step 1.5
Subtract 7 from 9.
0 | 9 | 10 | |
1 | 0 | 0 | |
- | 7 | 1 | |
2 | 9 |
Step 1.6
Subtract 0 from 0.
0 | 9 | 10 | |
1 | 0 | 0 | |
- | 7 | 1 | |
0 | 2 | 9 |
0 | 9 | 10 | |
1 | 0 | 0 | |
- | 7 | 1 | |
0 | 2 | 9 |
Step 2
The result of 100-71 is 29.
29