Solution - Long subtraction
2,487
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | thousands | hundreds | tens | ones |
| 2 | 5 | 1 | 4 | |
| 8 | ||||
| - | 1 | 9 | ||
2. Subtract the numbers using long subtraction method
Because the upper digit (4) in the ones column is too small to get a positive difference, borrow 2 from the number to the left (51) which becomes (49) and get (24).
| Place value | thousands | hundreds | tens | ones |
| 4 | 9 | 24 | ||
| 2 | 5 | 1 | 4 | |
| 8 | ||||
| - | 1 | 9 | ||
Subtract the numbers in the ones column from the top number:
24-8-9=7
| Place value | thousands | hundreds | tens | ones |
| 4 | 9 | 24 | ||
| 2 | 5 | 1 | 4 | |
| 8 | ||||
| - | 1 | 9 | ||
| 7 |
Subtract the numbers in the tens column from the top number:
9-1=8
| Place value | thousands | hundreds | tens | ones |
| 4 | 9 | 24 | ||
| 2 | 5 | 1 | 4 | |
| 8 | ||||
| - | 1 | 9 | ||
| 8 | 7 |
Write 4 in the hundreds place.
| Place value | thousands | hundreds | tens | ones |
| 4 | 9 | 24 | ||
| 2 | 5 | 1 | 4 | |
| 8 | ||||
| - | 1 | 9 | ||
| 4 | 8 | 7 |
Write 2 in the thousands place.
| Place value | thousands | hundreds | tens | ones |
| 4 | 9 | 24 | ||
| 2 | 5 | 1 | 4 | |
| 8 | ||||
| - | 1 | 9 | ||
| 2 | 4 | 8 | 7 |
The solution is: 2,487
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