Solution - Long subtraction
89
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | hundreds | tens | ones |
| 1 | 1 | 2 | |
| 7 | |||
| - | 1 | 6 | |
2. Subtract the numbers using long subtraction method
Because the upper digit (2) in the ones column is too small to get a positive difference, borrow 2 from the number to the left (11) which becomes (09) and get (22).
| Place value | hundreds | tens | ones |
| 0 | 9 | 22 | |
| 1 | 1 | 2 | |
| 7 | |||
| - | 1 | 6 | |
Subtract the numbers in the ones column from the top number:
22-7-6=9
| Place value | hundreds | tens | ones |
| 0 | 9 | 22 | |
| 1 | 1 | 2 | |
| 7 | |||
| - | 1 | 6 | |
| 9 |
Subtract the numbers in the tens column from the top number:
9-1=8
| Place value | hundreds | tens | ones |
| 0 | 9 | 22 | |
| 1 | 1 | 2 | |
| 7 | |||
| - | 1 | 6 | |
| 8 | 9 |
Write 0 in the hundreds place.
| Place value | hundreds | tens | ones |
| 0 | 9 | 22 | |
| 1 | 1 | 2 | |
| 7 | |||
| - | 1 | 6 | |
| 0 | 8 | 9 |
The solution is: 89
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