Solution - Long subtraction
453
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | hundreds | tens | ones |
| 7 | 9 | 8 | |
| - | 3 | 4 | 5 |
2. Subtract the numbers using long subtraction method
Subtract the numbers in the ones column from the top number:
8-5=3
| Place value | hundreds | tens | ones |
| 7 | 9 | 8 | |
| - | 3 | 4 | 5 |
| 3 |
Subtract the numbers in the tens column from the top number:
9-4=5
| Place value | hundreds | tens | ones |
| 7 | 9 | 8 | |
| - | 3 | 4 | 5 |
| 5 | 3 |
Subtract the numbers in the hundreds column from the top number:
7-3=4
| Place value | hundreds | tens | ones |
| 7 | 9 | 8 | |
| - | 3 | 4 | 5 |
| 4 | 5 | 3 |
The solution is: 453
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