Solution - Long subtraction
1,990
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | thousands | hundreds | tens | ones |
| 2 | 6 | 1 | 8 | |
| - | 6 | 2 | 8 | |
2. Subtract the numbers using long subtraction method
Subtract the numbers in the ones column from the top number:
8-8=0
| Place value | thousands | hundreds | tens | ones |
| 2 | 6 | 1 | 8 | |
| - | 6 | 2 | 8 | |
| 0 |
Because the upper digit (1) in the tens column is too small to get a positive difference, borrow 1 from the digit (6) in the next number place which becomes (5) and get (11).
| Place value | thousands | hundreds | tens | ones |
| 5 | 11 | |||
| 2 | 6 | 1 | 8 | |
| - | 6 | 2 | 8 | |
| 0 |
Subtract the numbers in the tens column from the top number:
11-2=9
| Place value | thousands | hundreds | tens | ones |
| 5 | 11 | |||
| 2 | 6 | 1 | 8 | |
| - | 6 | 2 | 8 | |
| 9 | 0 |
Because the upper digit (5) in the hundreds 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 (15).
| Place value | thousands | hundreds | tens | ones |
| 1 | 15 | |||
| 5 | 11 | |||
| 2 | 6 | 1 | 8 | |
| - | 6 | 2 | 8 | |
| 9 | 0 |
Subtract the numbers in the hundreds column from the top number:
15-6=9
| Place value | thousands | hundreds | tens | ones |
| 1 | 15 | |||
| 5 | 11 | |||
| 2 | 6 | 1 | 8 | |
| - | 6 | 2 | 8 | |
| 9 | 9 | 0 |
Write 1 in the thousands place.
| Place value | thousands | hundreds | tens | ones |
| 1 | 15 | |||
| 5 | 11 | |||
| 2 | 6 | 1 | 8 | |
| - | 6 | 2 | 8 | |
| 1 | 9 | 9 | 0 |
The solution is: 1,990
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