Soluzione - Long subtraction
133
Spiegazione passo passo
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | hundreds | tens | ones |
| 1 | 9 | 0 | |
| 1 | 9 | ||
| - | 3 | 8 | |
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 (9) in the next number place which becomes (7) and get (20).
| Place value | hundreds | tens | ones |
| 7 | 20 | ||
| 1 | 9 | 0 | |
| 1 | 9 | ||
| - | 3 | 8 | |
Subtract the numbers in the ones column from the top number:
20-9-8=3
| Place value | hundreds | tens | ones |
| 7 | 20 | ||
| 1 | 9 | 0 | |
| 1 | 9 | ||
| - | 3 | 8 | |
| 3 |
Subtract the numbers in the tens column from the top number:
7-1-3=3
| Place value | hundreds | tens | ones |
| 7 | 20 | ||
| 1 | 9 | 0 | |
| 1 | 9 | ||
| - | 3 | 8 | |
| 3 | 3 |
Write 1 in the hundreds place.
| Place value | hundreds | tens | ones |
| 7 | 20 | ||
| 1 | 9 | 0 | |
| 1 | 9 | ||
| - | 3 | 8 | |
| 1 | 3 | 3 |
The solution is: 133
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