Solution - Long subtraction
3,400
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 | 0 | 0 | |
| - | 4 | 0 | 0 | |
2. Subtract the numbers using long subtraction method
Subtract the numbers in the ones column from the top number:
0-0=0
| Place value | thousands | hundreds | tens | ones |
| 3 | 8 | 0 | 0 | |
| - | 4 | 0 | 0 | |
| 0 |
Subtract the numbers in the tens column from the top number:
0-0=0
| Place value | thousands | hundreds | tens | ones |
| 3 | 8 | 0 | 0 | |
| - | 4 | 0 | 0 | |
| 0 | 0 |
Subtract the numbers in the hundreds column from the top number:
8-4=4
| Place value | thousands | hundreds | tens | ones |
| 3 | 8 | 0 | 0 | |
| - | 4 | 0 | 0 | |
| 4 | 0 | 0 |
Write 3 in the thousands place.
| Place value | thousands | hundreds | tens | ones |
| 3 | 8 | 0 | 0 | |
| - | 4 | 0 | 0 | |
| 3 | 4 | 0 | 0 |
The solution is: 3,400
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