Soluzione - Long subtraction
8.138
Spiegazione passo passo
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | thousands | hundreds | tens | ones |
| 8 | 3 | 0 | 2 | |
| - | 1 | 6 | 4 | |
2. Subtract the numbers using long subtraction method
Because the upper digit (2) in the ones column is too small to get a positive difference, borrow 1 from the number to the left (30) which becomes (29) and get (12).
| Place value | thousands | hundreds | tens | ones |
| 2 | 9 | 12 | ||
| 8 | 3 | 0 | 2 | |
| - | 1 | 6 | 4 | |
Subtract the numbers in the ones column from the top number:
12-4=8
| Place value | thousands | hundreds | tens | ones |
| 2 | 9 | 12 | ||
| 8 | 3 | 0 | 2 | |
| - | 1 | 6 | 4 | |
| 8 |
Subtract the numbers in the tens column from the top number:
9-6=3
| Place value | thousands | hundreds | tens | ones |
| 2 | 9 | 12 | ||
| 8 | 3 | 0 | 2 | |
| - | 1 | 6 | 4 | |
| 3 | 8 |
Subtract the numbers in the hundreds column from the top number:
2-1=1
| Place value | thousands | hundreds | tens | ones |
| 2 | 9 | 12 | ||
| 8 | 3 | 0 | 2 | |
| - | 1 | 6 | 4 | |
| 1 | 3 | 8 |
Write 8 in the thousands place.
| Place value | thousands | hundreds | tens | ones |
| 2 | 9 | 12 | ||
| 8 | 3 | 0 | 2 | |
| - | 1 | 6 | 4 | |
| 8 | 1 | 3 | 8 |
The solution is: 8,138
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