Solution - Long subtraction
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | thousands | hundreds | tens | ones |
| 3 | 5 | 4 | 6 | |
| - | 2 | 8 | 5 | 9 |
2. Subtract the numbers using long subtraction method
Because the upper digit (6) in the ones column is too small to get a positive difference, borrow 1 from the digit (4) in the next number place which becomes (3) and get (16).
| Place value | thousands | hundreds | tens | ones |
| 3 | 16 | |||
| 3 | 5 | 4 | 6 | |
| - | 2 | 8 | 5 | 9 |
Subtract the numbers in the ones column from the top number:
16-9=7
| Place value | thousands | hundreds | tens | ones |
| 3 | 16 | |||
| 3 | 5 | 4 | 6 | |
| - | 2 | 8 | 5 | 9 |
| 7 |
Because the upper digit (3) in the tens 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 (13).
| Place value | thousands | hundreds | tens | ones |
| 4 | 13 | |||
| 3 | 16 | |||
| 3 | 5 | 4 | 6 | |
| - | 2 | 8 | 5 | 9 |
| 7 |
Subtract the numbers in the tens column from the top number:
13-5=8
| Place value | thousands | hundreds | tens | ones |
| 4 | 13 | |||
| 3 | 16 | |||
| 3 | 5 | 4 | 6 | |
| - | 2 | 8 | 5 | 9 |
| 8 | 7 |
Because the upper digit (4) in the hundreds column is too small to get a positive difference, borrow 1 from the digit (3) in the next number place which becomes (2) and get (14).
| Place value | thousands | hundreds | tens | ones |
| 2 | 14 | |||
| 4 | 13 | |||
| 3 | 16 | |||
| 3 | 5 | 4 | 6 | |
| - | 2 | 8 | 5 | 9 |
| 8 | 7 |
Subtract the numbers in the hundreds column from the top number:
14-8=6
| Place value | thousands | hundreds | tens | ones |
| 2 | 14 | |||
| 4 | 13 | |||
| 3 | 16 | |||
| 3 | 5 | 4 | 6 | |
| - | 2 | 8 | 5 | 9 |
| 6 | 8 | 7 |
Subtract the numbers in the thousands column from the top number:
2-2=0
| Place value | thousands | hundreds | tens | ones |
| 2 | 14 | |||
| 4 | 13 | |||
| 3 | 16 | |||
| 3 | 5 | 4 | 6 | |
| - | 2 | 8 | 5 | 9 |
| 0 | 6 | 8 | 7 |
The solution is: 687
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