Solution - Long subtraction
387
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | hundreds | tens | ones |
| 3 | 8 | 9 | |
| - | 2 | ||
2. Subtract the numbers using long subtraction method
Subtract the numbers in the ones column from the top number:
9-2=7
| Place value | hundreds | tens | ones |
| 3 | 8 | 9 | |
| - | 2 | ||
| 7 |
Write 8 in the tens place.
| Place value | hundreds | tens | ones |
| 3 | 8 | 9 | |
| - | 2 | ||
| 8 | 7 |
Write 3 in the hundreds place.
| Place value | hundreds | tens | ones |
| 3 | 8 | 9 | |
| - | 2 | ||
| 3 | 8 | 7 |
The solution is: 387
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