Solution - Long subtraction
3,794
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | thousands | hundreds | tens | ones |
| 3 | 8 | 1 | 8 | |
| 2 | ||||
| - | 2 | 2 | ||
2. Subtract the numbers using long subtraction method
Subtract the numbers in the ones column from the top number:
8-2-2=4
| Place value | thousands | hundreds | tens | ones |
| 3 | 8 | 1 | 8 | |
| 2 | ||||
| - | 2 | 2 | ||
| 4 |
Because the upper digit (1) in the tens column is too small to get a positive difference, borrow 1 from the digit (8) in the next number place which becomes (7) and get (11).
| Place value | thousands | hundreds | tens | ones |
| 7 | 11 | |||
| 3 | 8 | 1 | 8 | |
| 2 | ||||
| - | 2 | 2 | ||
| 4 |
Subtract the numbers in the tens column from the top number:
11-2=9
| Place value | thousands | hundreds | tens | ones |
| 7 | 11 | |||
| 3 | 8 | 1 | 8 | |
| 2 | ||||
| - | 2 | 2 | ||
| 9 | 4 |
Write 7 in the hundreds place.
| Place value | thousands | hundreds | tens | ones |
| 7 | 11 | |||
| 3 | 8 | 1 | 8 | |
| 2 | ||||
| - | 2 | 2 | ||
| 7 | 9 | 4 |
Write 3 in the thousands place.
| Place value | thousands | hundreds | tens | ones |
| 7 | 11 | |||
| 3 | 8 | 1 | 8 | |
| 2 | ||||
| - | 2 | 2 | ||
| 3 | 7 | 9 | 4 |
The solution is: 3,794
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