Solution - Long subtraction
21,040
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 6 | 5 | 2 | 8 | 0 | 6 | |
| - | 6 | 3 | 1 | 7 | 6 | 6 |
2. Subtract the numbers using long subtraction method
Subtract the numbers in the ones column from the top number:
6-6=0
| Place value | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 6 | 5 | 2 | 8 | 0 | 6 | |
| - | 6 | 3 | 1 | 7 | 6 | 6 |
| 0 |
Because the upper digit (0) 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 (10).
| Place value | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 7 | 10 | |||||
| 6 | 5 | 2 | 8 | 0 | 6 | |
| - | 6 | 3 | 1 | 7 | 6 | 6 |
| 0 |
Subtract the numbers in the tens column from the top number:
10-6=4
| Place value | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 7 | 10 | |||||
| 6 | 5 | 2 | 8 | 0 | 6 | |
| - | 6 | 3 | 1 | 7 | 6 | 6 |
| 4 | 0 |
Subtract the numbers in the hundreds column from the top number:
7-7=0
| Place value | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 7 | 10 | |||||
| 6 | 5 | 2 | 8 | 0 | 6 | |
| - | 6 | 3 | 1 | 7 | 6 | 6 |
| 0 | 4 | 0 |
Subtract the numbers in the thousands column from the top number:
2-1=1
| Place value | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 7 | 10 | |||||
| 6 | 5 | 2 | 8 | 0 | 6 | |
| - | 6 | 3 | 1 | 7 | 6 | 6 |
| 1 | 0 | 4 | 0 |
Subtract the numbers in the ten thousands column from the top number:
5-3=2
| Place value | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 7 | 10 | |||||
| 6 | 5 | 2 | 8 | 0 | 6 | |
| - | 6 | 3 | 1 | 7 | 6 | 6 |
| 2 | 1 | 0 | 4 | 0 |
Subtract the numbers in the hundred thousands column from the top number:
6-6=0
| Place value | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 7 | 10 | |||||
| 6 | 5 | 2 | 8 | 0 | 6 | |
| - | 6 | 3 | 1 | 7 | 6 | 6 |
| 0 | 2 | 1 | 0 | 4 | 0 |
The solution is: 21,040
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