Soluzione - Long subtraction
684
Spiegazione passo passo
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | thousands | hundreds | tens | ones |
| 1 | 8 | 2 | 4 | |
| - | 1 | 1 | 4 | 0 |
2. Subtract the numbers using long subtraction method
Subtract the numbers in the ones column from the top number:
4-0=4
| Place value | thousands | hundreds | tens | ones |
| 1 | 8 | 2 | 4 | |
| - | 1 | 1 | 4 | 0 |
| 4 |
Because the upper digit (2) 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 (12).
| Place value | thousands | hundreds | tens | ones |
| 7 | 12 | |||
| 1 | 8 | 2 | 4 | |
| - | 1 | 1 | 4 | 0 |
| 4 |
Subtract the numbers in the tens column from the top number:
12-4=8
| Place value | thousands | hundreds | tens | ones |
| 7 | 12 | |||
| 1 | 8 | 2 | 4 | |
| - | 1 | 1 | 4 | 0 |
| 8 | 4 |
Subtract the numbers in the hundreds column from the top number:
7-1=6
| Place value | thousands | hundreds | tens | ones |
| 7 | 12 | |||
| 1 | 8 | 2 | 4 | |
| - | 1 | 1 | 4 | 0 |
| 6 | 8 | 4 |
Subtract the numbers in the thousands column from the top number:
1-1=0
| Place value | thousands | hundreds | tens | ones |
| 7 | 12 | |||
| 1 | 8 | 2 | 4 | |
| - | 1 | 1 | 4 | 0 |
| 0 | 6 | 8 | 4 |
The solution is: 684
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