Solution - Long subtraction
161
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | hundreds | tens | ones |
| 1 | 7 | 7 | |
| 3 | |||
| - | 1 | 3 | |
2. Subtract the numbers using long subtraction method
Subtract the numbers in the ones column from the top number:
7-3-3=1
| Place value | hundreds | tens | ones |
| 1 | 7 | 7 | |
| 3 | |||
| - | 1 | 3 | |
| 1 |
Subtract the numbers in the tens column from the top number:
7-1=6
| Place value | hundreds | tens | ones |
| 1 | 7 | 7 | |
| 3 | |||
| - | 1 | 3 | |
| 6 | 1 |
Write 1 in the hundreds place.
| Place value | hundreds | tens | ones |
| 1 | 7 | 7 | |
| 3 | |||
| - | 1 | 3 | |
| 1 | 6 | 1 |
The solution is: 161
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