Soluzione - Long subtraction
20
Spiegazione passo passo
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | tens | ones |
| 2 | 2 | |
| 1 | ||
| - | 1 | |
2. Subtract the numbers using long subtraction method
Subtract the numbers in the ones column from the top number:
2-1-1=0
| Place value | tens | ones |
| 2 | 2 | |
| 1 | ||
| - | 1 | |
| 0 |
Write 2 in the tens place.
| Place value | tens | ones |
| 2 | 2 | |
| 1 | ||
| - | 1 | |
| 2 | 0 |
The solution is: 20
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