Solution - Long subtraction
6,800
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | thousands | hundreds | tens | ones |
| 7 | 0 | 0 | 0 | |
| - | 2 | 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 |
| 7 | 0 | 0 | 0 | |
| - | 2 | 0 | 0 | |
| 0 |
Subtract the numbers in the tens column from the top number:
0-0=0
| Place value | thousands | hundreds | tens | ones |
| 7 | 0 | 0 | 0 | |
| - | 2 | 0 | 0 | |
| 0 | 0 |
Because the upper digit (0) 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 (10).
| Place value | thousands | hundreds | tens | ones |
| 6 | 10 | |||
| 7 | 0 | 0 | 0 | |
| - | 2 | 0 | 0 | |
| 0 | 0 |
Subtract the numbers in the hundreds column from the top number:
10-2=8
| Place value | thousands | hundreds | tens | ones |
| 6 | 10 | |||
| 7 | 0 | 0 | 0 | |
| - | 2 | 0 | 0 | |
| 8 | 0 | 0 |
Write 6 in the thousands place.
| Place value | thousands | hundreds | tens | ones |
| 6 | 10 | |||
| 7 | 0 | 0 | 0 | |
| - | 2 | 0 | 0 | |
| 6 | 8 | 0 | 0 |
The solution is: 6,800
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