Soluzione - Long subtraction
Spiegazione passo passo
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 5 | 0 | 8 | 1 | 8 | 9 | |
| - | 4 | 9 | 6 | 1 | 9 | 3 |
2. Subtract the numbers using long subtraction method
Subtract the numbers in the ones column from the top number:
9-3=6
| Place value | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 5 | 0 | 8 | 1 | 8 | 9 | |
| - | 4 | 9 | 6 | 1 | 9 | 3 |
| 6 |
Because the upper digit (8) in the tens 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 (18).
| Place value | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 0 | 18 | |||||
| 5 | 0 | 8 | 1 | 8 | 9 | |
| - | 4 | 9 | 6 | 1 | 9 | 3 |
| 6 |
Subtract the numbers in the tens column from the top number:
18-9=9
| Place value | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 0 | 18 | |||||
| 5 | 0 | 8 | 1 | 8 | 9 | |
| - | 4 | 9 | 6 | 1 | 9 | 3 |
| 9 | 6 |
Because the upper digit (0) in the hundreds 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 (10).
| Place value | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 7 | 10 | |||||
| 0 | 18 | |||||
| 5 | 0 | 8 | 1 | 8 | 9 | |
| - | 4 | 9 | 6 | 1 | 9 | 3 |
| 9 | 6 |
Subtract the numbers in the hundreds column from the top number:
10-1=9
| Place value | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 7 | 10 | |||||
| 0 | 18 | |||||
| 5 | 0 | 8 | 1 | 8 | 9 | |
| - | 4 | 9 | 6 | 1 | 9 | 3 |
| 9 | 9 | 6 |
Subtract the numbers in the thousands column from the top number:
7-6=1
| Place value | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 7 | 10 | |||||
| 0 | 18 | |||||
| 5 | 0 | 8 | 1 | 8 | 9 | |
| - | 4 | 9 | 6 | 1 | 9 | 3 |
| 1 | 9 | 9 | 6 |
Because the upper digit (0) in the ten thousands column is too small to get a positive difference, borrow 1 from the digit (5) in the next number place which becomes (4) and get (10).
| Place value | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 4 | 10 | |||||
| 7 | 10 | |||||
| 0 | 18 | |||||
| 5 | 0 | 8 | 1 | 8 | 9 | |
| - | 4 | 9 | 6 | 1 | 9 | 3 |
| 1 | 9 | 9 | 6 |
Subtract the numbers in the ten thousands column from the top number:
10-9=1
| Place value | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 4 | 10 | |||||
| 7 | 10 | |||||
| 0 | 18 | |||||
| 5 | 0 | 8 | 1 | 8 | 9 | |
| - | 4 | 9 | 6 | 1 | 9 | 3 |
| 1 | 1 | 9 | 9 | 6 |
Subtract the numbers in the hundred thousands column from the top number:
4-4=0
| Place value | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 4 | 10 | |||||
| 7 | 10 | |||||
| 0 | 18 | |||||
| 5 | 0 | 8 | 1 | 8 | 9 | |
| - | 4 | 9 | 6 | 1 | 9 | 3 |
| 0 | 1 | 1 | 9 | 9 | 6 |
The solution is: 11,996
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