Soluzione - Long subtraction
Spiegazione passo passo
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | ten thousands | thousands | hundreds | tens | ones |
| 1 | 0 | 8 | 4 | 2 | |
| - | 4 | 0 | 8 | 5 | |
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 digit (4) in the next number place which becomes (3) and get (12).
| Place value | ten thousands | thousands | hundreds | tens | ones |
| 3 | 12 | ||||
| 1 | 0 | 8 | 4 | 2 | |
| - | 4 | 0 | 8 | 5 | |
Subtract the numbers in the ones column from the top number:
12-5=7
| Place value | ten thousands | thousands | hundreds | tens | ones |
| 3 | 12 | ||||
| 1 | 0 | 8 | 4 | 2 | |
| - | 4 | 0 | 8 | 5 | |
| 7 |
Because the upper digit (3) in the tens column is too small to get a positive difference, borrow 1 from the digit (8) in the next number place which becomes (7) and get (13).
| Place value | ten thousands | thousands | hundreds | tens | ones |
| 7 | 13 | ||||
| 3 | 12 | ||||
| 1 | 0 | 8 | 4 | 2 | |
| - | 4 | 0 | 8 | 5 | |
| 7 |
Subtract the numbers in the tens column from the top number:
13-8=5
| Place value | ten thousands | thousands | hundreds | tens | ones |
| 7 | 13 | ||||
| 3 | 12 | ||||
| 1 | 0 | 8 | 4 | 2 | |
| - | 4 | 0 | 8 | 5 | |
| 5 | 7 |
Subtract the numbers in the hundreds column from the top number:
7-0=7
| Place value | ten thousands | thousands | hundreds | tens | ones |
| 7 | 13 | ||||
| 3 | 12 | ||||
| 1 | 0 | 8 | 4 | 2 | |
| - | 4 | 0 | 8 | 5 | |
| 7 | 5 | 7 |
Because the upper digit (0) in the thousands column is too small to get a positive difference, borrow 1 from the digit (1) in the next number place which becomes (0) and get (10).
| Place value | ten thousands | thousands | hundreds | tens | ones |
| 0 | 10 | ||||
| 7 | 13 | ||||
| 3 | 12 | ||||
| 1 | 0 | 8 | 4 | 2 | |
| - | 4 | 0 | 8 | 5 | |
| 7 | 5 | 7 |
Subtract the numbers in the thousands column from the top number:
10-4=6
| Place value | ten thousands | thousands | hundreds | tens | ones |
| 0 | 10 | ||||
| 7 | 13 | ||||
| 3 | 12 | ||||
| 1 | 0 | 8 | 4 | 2 | |
| - | 4 | 0 | 8 | 5 | |
| 6 | 7 | 5 | 7 |
Write 0 in the ten thousands place.
| Place value | ten thousands | thousands | hundreds | tens | ones |
| 0 | 10 | ||||
| 7 | 13 | ||||
| 3 | 12 | ||||
| 1 | 0 | 8 | 4 | 2 | |
| - | 4 | 0 | 8 | 5 | |
| 0 | 6 | 7 | 5 | 7 |
The solution is: 6,757
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