Soluzione - Long subtraction
159
Spiegazione passo passo
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | hundreds | tens | ones |
| 2 | 7 | 4 | |
| - | 1 | 1 | 5 |
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 (7) in the next number place which becomes (6) and get (14).
| Place value | hundreds | tens | ones |
| 6 | 14 | ||
| 2 | 7 | 4 | |
| - | 1 | 1 | 5 |
Subtract the numbers in the ones column from the top number:
14-5=9
| Place value | hundreds | tens | ones |
| 6 | 14 | ||
| 2 | 7 | 4 | |
| - | 1 | 1 | 5 |
| 9 |
Subtract the numbers in the tens column from the top number:
6-1=5
| Place value | hundreds | tens | ones |
| 6 | 14 | ||
| 2 | 7 | 4 | |
| - | 1 | 1 | 5 |
| 5 | 9 |
Subtract the numbers in the hundreds column from the top number:
2-1=1
| Place value | hundreds | tens | ones |
| 6 | 14 | ||
| 2 | 7 | 4 | |
| - | 1 | 1 | 5 |
| 1 | 5 | 9 |
The solution is: 159
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