Solution - Long subtraction
3,220
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | thousands | hundreds | tens | ones |
| 3 | 2 | 2 | 1 | |
| - | 1 | |||
2. Subtract the numbers using long subtraction method
Subtract the numbers in the ones column from the top number:
1-1=0
| Place value | thousands | hundreds | tens | ones |
| 3 | 2 | 2 | 1 | |
| - | 1 | |||
| 0 |
Write 2 in the tens place.
| Place value | thousands | hundreds | tens | ones |
| 3 | 2 | 2 | 1 | |
| - | 1 | |||
| 2 | 0 |
Write 2 in the hundreds place.
| Place value | thousands | hundreds | tens | ones |
| 3 | 2 | 2 | 1 | |
| - | 1 | |||
| 2 | 2 | 0 |
Write 3 in the thousands place.
| Place value | thousands | hundreds | tens | ones |
| 3 | 2 | 2 | 1 | |
| - | 1 | |||
| 3 | 2 | 2 | 0 |
The solution is: 3,220
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