Soluzione - Long subtraction
79
Spiegazione passo passo
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | tens | ones |
| 8 | 5 | |
| - | 6 | |
2. Subtract the numbers using long subtraction method
Because the upper digit (5) in the ones column is too small to get a positive difference, borrow 1 from the digit (8) in the next number place which becomes (7) and get (15).
| Place value | tens | ones |
| 7 | 15 | |
| 8 | 5 | |
| - | 6 | |
Subtract the numbers in the ones column from the top number:
15-6=9
| Place value | tens | ones |
| 7 | 15 | |
| 8 | 5 | |
| - | 6 | |
| 9 |
Write 7 in the tens place.
| Place value | tens | ones |
| 7 | 15 | |
| 8 | 5 | |
| - | 6 | |
| 7 | 9 |
The solution is: 79
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