Solution - Long subtraction
318
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | hundreds | tens | ones |
| 3 | 4 | 5 | |
| - | 2 | 7 | |
2. Subtract the numbers using long subtraction method
Because the upper digit (5) in the ones column is too small to get a positive difference, borrow 1 from the digit (4) in the next number place which becomes (3) and get (15).
| Place value | hundreds | tens | ones |
| 3 | 15 | ||
| 3 | 4 | 5 | |
| - | 2 | 7 | |
Subtract the numbers in the ones column from the top number:
15-7=8
| Place value | hundreds | tens | ones |
| 3 | 15 | ||
| 3 | 4 | 5 | |
| - | 2 | 7 | |
| 8 |
Subtract the numbers in the tens column from the top number:
3-2=1
| Place value | hundreds | tens | ones |
| 3 | 15 | ||
| 3 | 4 | 5 | |
| - | 2 | 7 | |
| 1 | 8 |
Write 3 in the hundreds place.
| Place value | hundreds | tens | ones |
| 3 | 15 | ||
| 3 | 4 | 5 | |
| - | 2 | 7 | |
| 3 | 1 | 8 |
The solution is: 318
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