Soluzione - Long subtraction
15
Spiegazione passo passo
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | tens | ones |
| 3 | 0 | |
| 6 | ||
| - | 9 | |
2. Subtract the numbers using long subtraction method
Because the upper digit (0) in the ones column is too small to get a positive difference, borrow 2 from the digit (3) in the next number place which becomes (1) and get (20).
| Place value | tens | ones |
| 1 | 20 | |
| 3 | 0 | |
| 6 | ||
| - | 9 | |
Subtract the numbers in the ones column from the top number:
20-6-9=5
| Place value | tens | ones |
| 1 | 20 | |
| 3 | 0 | |
| 6 | ||
| - | 9 | |
| 5 |
Write 1 in the tens place.
| Place value | tens | ones |
| 1 | 20 | |
| 3 | 0 | |
| 6 | ||
| - | 9 | |
| 1 | 5 |
The solution is: 15
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