Solution - Long subtraction
411
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | thousands | hundreds | tens | ones |
| 1 | 0 | 2 | 5 | |
| - | 6 | 1 | 4 | |
2. Subtract the numbers using long subtraction method
Subtract the numbers in the ones column from the top number:
5-4=1
| Place value | thousands | hundreds | tens | ones |
| 1 | 0 | 2 | 5 | |
| - | 6 | 1 | 4 | |
| 1 |
Subtract the numbers in the tens column from the top number:
2-1=1
| Place value | thousands | hundreds | tens | ones |
| 1 | 0 | 2 | 5 | |
| - | 6 | 1 | 4 | |
| 1 | 1 |
Because the upper digit (0) in the hundreds 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 | thousands | hundreds | tens | ones |
| 0 | 10 | |||
| 1 | 0 | 2 | 5 | |
| - | 6 | 1 | 4 | |
| 1 | 1 |
Subtract the numbers in the hundreds column from the top number:
10-6=4
| Place value | thousands | hundreds | tens | ones |
| 0 | 10 | |||
| 1 | 0 | 2 | 5 | |
| - | 6 | 1 | 4 | |
| 4 | 1 | 1 |
Write 0 in the thousands place.
| Place value | thousands | hundreds | tens | ones |
| 0 | 10 | |||
| 1 | 0 | 2 | 5 | |
| - | 6 | 1 | 4 | |
| 0 | 4 | 1 | 1 |
The solution is: 411
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