Solution - Long subtraction
345
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 | 0 | 4 | |
| - | 6 | 5 | 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 1 from the number to the left (100) which becomes (099) and get (14).
| Place value | thousands | hundreds | tens | ones |
| 0 | 9 | 9 | 14 | |
| 1 | 0 | 0 | 4 | |
| - | 6 | 5 | 9 | |
Subtract the numbers in the ones column from the top number:
14-9=5
| Place value | thousands | hundreds | tens | ones |
| 0 | 9 | 9 | 14 | |
| 1 | 0 | 0 | 4 | |
| - | 6 | 5 | 9 | |
| 5 |
Subtract the numbers in the tens column from the top number:
9-5=4
| Place value | thousands | hundreds | tens | ones |
| 0 | 9 | 9 | 14 | |
| 1 | 0 | 0 | 4 | |
| - | 6 | 5 | 9 | |
| 4 | 5 |
Subtract the numbers in the hundreds column from the top number:
9-6=3
| Place value | thousands | hundreds | tens | ones |
| 0 | 9 | 9 | 14 | |
| 1 | 0 | 0 | 4 | |
| - | 6 | 5 | 9 | |
| 3 | 4 | 5 |
Write 0 in the thousands place.
| Place value | thousands | hundreds | tens | ones |
| 0 | 9 | 9 | 14 | |
| 1 | 0 | 0 | 4 | |
| - | 6 | 5 | 9 | |
| 0 | 3 | 4 | 5 |
The solution is: 345
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