Solution - Long subtraction
3,645
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | thousands | hundreds | tens | ones |
| 7 | 1 | 5 | 0 | |
| - | 3 | 5 | 0 | 5 |
2. Subtract the numbers using long subtraction method
Because the upper digit (0) in the ones 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 (10).
| Place value | thousands | hundreds | tens | ones |
| 4 | 10 | |||
| 7 | 1 | 5 | 0 | |
| - | 3 | 5 | 0 | 5 |
Subtract the numbers in the ones column from the top number:
10-5=5
| Place value | thousands | hundreds | tens | ones |
| 4 | 10 | |||
| 7 | 1 | 5 | 0 | |
| - | 3 | 5 | 0 | 5 |
| 5 |
Subtract the numbers in the tens column from the top number:
4-0=4
| Place value | thousands | hundreds | tens | ones |
| 4 | 10 | |||
| 7 | 1 | 5 | 0 | |
| - | 3 | 5 | 0 | 5 |
| 4 | 5 |
Because the upper digit (1) in the hundreds column is too small to get a positive difference, borrow 1 from the digit (7) in the next number place which becomes (6) and get (11).
| Place value | thousands | hundreds | tens | ones |
| 6 | 11 | |||
| 4 | 10 | |||
| 7 | 1 | 5 | 0 | |
| - | 3 | 5 | 0 | 5 |
| 4 | 5 |
Subtract the numbers in the hundreds column from the top number:
11-5=6
| Place value | thousands | hundreds | tens | ones |
| 6 | 11 | |||
| 4 | 10 | |||
| 7 | 1 | 5 | 0 | |
| - | 3 | 5 | 0 | 5 |
| 6 | 4 | 5 |
Subtract the numbers in the thousands column from the top number:
6-3=3
| Place value | thousands | hundreds | tens | ones |
| 6 | 11 | |||
| 4 | 10 | |||
| 7 | 1 | 5 | 0 | |
| - | 3 | 5 | 0 | 5 |
| 3 | 6 | 4 | 5 |
The solution is: 3,645
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