Solution - Long subtraction
136
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | hundreds | tens | ones |
| 1 | 3 | 9 | |
| - | 3 | ||
2. Subtract the numbers using long subtraction method
Subtract the numbers in the ones column from the top number:
9-3=6
| Place value | hundreds | tens | ones |
| 1 | 3 | 9 | |
| - | 3 | ||
| 6 |
Write 3 in the tens place.
| Place value | hundreds | tens | ones |
| 1 | 3 | 9 | |
| - | 3 | ||
| 3 | 6 |
Write 1 in the hundreds place.
| Place value | hundreds | tens | ones |
| 1 | 3 | 9 | |
| - | 3 | ||
| 1 | 3 | 6 |
The solution is: 136
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