Solution - Long subtraction
4.5
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | ones | . | tenths |
| 7 | . | 9 | |
| - | 3 | . | 4 |
| . |
2. Subtract the numbers using long subtraction method
Subtract the numbers in the tenths column from the top number:
9-4=5
| Place value | ones | . | tenths |
| 7 | . | 9 | |
| - | 3 | . | 4 |
| . | 5 |
Subtract the numbers in the ones column from the top number:
7-3=4
| Place value | ones | . | tenths |
| 7 | . | 9 | |
| - | 3 | . | 4 |
| 4 | . | 5 |
The solution is: 4.5
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