Solution - Long subtraction
3,117
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | thousands | hundreds | tens | ones |
| 3 | 1 | 2 | 2 | |
| - | 5 | |||
2. Subtract the numbers using long subtraction method
Because the upper digit (2) in the ones column is too small to get a positive difference, borrow 1 from the digit (2) in the next number place which becomes (1) and get (12).
| Place value | thousands | hundreds | tens | ones |
| 1 | 12 | |||
| 3 | 1 | 2 | 2 | |
| - | 5 | |||
Subtract the numbers in the ones column from the top number:
12-5=7
| Place value | thousands | hundreds | tens | ones |
| 1 | 12 | |||
| 3 | 1 | 2 | 2 | |
| - | 5 | |||
| 7 |
Write 1 in the tens place.
| Place value | thousands | hundreds | tens | ones |
| 1 | 12 | |||
| 3 | 1 | 2 | 2 | |
| - | 5 | |||
| 1 | 7 |
Write 1 in the hundreds place.
| Place value | thousands | hundreds | tens | ones |
| 1 | 12 | |||
| 3 | 1 | 2 | 2 | |
| - | 5 | |||
| 1 | 1 | 7 |
Write 3 in the thousands place.
| Place value | thousands | hundreds | tens | ones |
| 1 | 12 | |||
| 3 | 1 | 2 | 2 | |
| - | 5 | |||
| 3 | 1 | 1 | 7 |
The solution is: 3,117
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