คำตอบ - Long subtraction
74
คำอธิบายทีละขั้นตอน
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | tens | ones |
| 7 | 5 | |
| - | 1 | |
2. Subtract the numbers using long subtraction method
Subtract the numbers in the ones column from the top number:
5-1=4
| Place value | tens | ones |
| 7 | 5 | |
| - | 1 | |
| 4 |
Write 7 in the tens place.
| Place value | tens | ones |
| 7 | 5 | |
| - | 1 | |
| 7 | 4 |
The solution is: 74
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