Soluzione - Long subtraction
66
Spiegazione passo passo
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | tens | ones |
| 9 | 0 | |
| - | 2 | 4 |
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 1 from the digit (9) in the next number place which becomes (8) and get (10).
| Place value | tens | ones |
| 8 | 10 | |
| 9 | 0 | |
| - | 2 | 4 |
Subtract the numbers in the ones column from the top number:
10-4=6
| Place value | tens | ones |
| 8 | 10 | |
| 9 | 0 | |
| - | 2 | 4 |
| 6 |
Subtract the numbers in the tens column from the top number:
8-2=6
| Place value | tens | ones |
| 8 | 10 | |
| 9 | 0 | |
| - | 2 | 4 |
| 6 | 6 |
The solution is: 66
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