Soluzione - Long subtraction
255
Spiegazione passo passo
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | hundreds | tens | ones |
| 3 | 4 | 0 | |
| - | 8 | 5 | |
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 (4) in the next number place which becomes (3) and get (10).
| Place value | hundreds | tens | ones |
| 3 | 10 | ||
| 3 | 4 | 0 | |
| - | 8 | 5 | |
Subtract the numbers in the ones column from the top number:
10-5=5
| Place value | hundreds | tens | ones |
| 3 | 10 | ||
| 3 | 4 | 0 | |
| - | 8 | 5 | |
| 5 |
Because the upper digit (3) in the tens column is too small to get a positive difference, borrow 1 from the digit (3) in the next number place which becomes (2) and get (13).
| Place value | hundreds | tens | ones |
| 2 | 13 | ||
| 3 | 10 | ||
| 3 | 4 | 0 | |
| - | 8 | 5 | |
| 5 |
Subtract the numbers in the tens column from the top number:
13-8=5
| Place value | hundreds | tens | ones |
| 2 | 13 | ||
| 3 | 10 | ||
| 3 | 4 | 0 | |
| - | 8 | 5 | |
| 5 | 5 |
Write 2 in the hundreds place.
| Place value | hundreds | tens | ones |
| 2 | 13 | ||
| 3 | 10 | ||
| 3 | 4 | 0 | |
| - | 8 | 5 | |
| 2 | 5 | 5 |
The solution is: 255
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