Soluzione - Long subtraction
27
Spiegazione passo passo
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | tens | ones |
| 5 | 4 | |
| - | 2 | 7 |
2. Subtract the numbers using long subtraction method
Because the upper digit (4) in the ones column is too small to get a positive difference, borrow 1 from the digit (5) in the next number place which becomes (4) and get (14).
| Place value | tens | ones |
| 4 | 14 | |
| 5 | 4 | |
| - | 2 | 7 |
Subtract the numbers in the ones column from the top number:
14-7=7
| Place value | tens | ones |
| 4 | 14 | |
| 5 | 4 | |
| - | 2 | 7 |
| 7 |
Subtract the numbers in the tens column from the top number:
4-2=2
| Place value | tens | ones |
| 4 | 14 | |
| 5 | 4 | |
| - | 2 | 7 |
| 2 | 7 |
The solution is: 27
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