Solution - Long subtraction
19,919
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | ten thousands | thousands | hundreds | tens | ones |
| 2 | 0 | 0 | 5 | 9 | |
| 4 | 0 | ||||
| - | 1 | 0 | 0 | ||
2. Subtract the numbers using long subtraction method
Subtract the numbers in the ones column from the top number:
9-0-0=9
| Place value | ten thousands | thousands | hundreds | tens | ones |
| 2 | 0 | 0 | 5 | 9 | |
| 4 | 0 | ||||
| - | 1 | 0 | 0 | ||
| 9 |
Subtract the numbers in the tens column from the top number:
5-4-0=1
| Place value | ten thousands | thousands | hundreds | tens | ones |
| 2 | 0 | 0 | 5 | 9 | |
| 4 | 0 | ||||
| - | 1 | 0 | 0 | ||
| 1 | 9 |
Because the upper digit (0) in the hundreds column is too small to get a positive difference, borrow 1 from the number to the left (20) which becomes (19) and get (10).
| Place value | ten thousands | thousands | hundreds | tens | ones |
| 1 | 9 | 10 | |||
| 2 | 0 | 0 | 5 | 9 | |
| 4 | 0 | ||||
| - | 1 | 0 | 0 | ||
| 1 | 9 |
Subtract the numbers in the hundreds column from the top number:
10-1=9
| Place value | ten thousands | thousands | hundreds | tens | ones |
| 1 | 9 | 10 | |||
| 2 | 0 | 0 | 5 | 9 | |
| 4 | 0 | ||||
| - | 1 | 0 | 0 | ||
| 9 | 1 | 9 |
Write 9 in the thousands place.
| Place value | ten thousands | thousands | hundreds | tens | ones |
| 1 | 9 | 10 | |||
| 2 | 0 | 0 | 5 | 9 | |
| 4 | 0 | ||||
| - | 1 | 0 | 0 | ||
| 9 | 9 | 1 | 9 |
Write 1 in the ten thousands place.
| Place value | ten thousands | thousands | hundreds | tens | ones |
| 1 | 9 | 10 | |||
| 2 | 0 | 0 | 5 | 9 | |
| 4 | 0 | ||||
| - | 1 | 0 | 0 | ||
| 1 | 9 | 9 | 1 | 9 |
The solution is: 19,919
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