Solution - Long subtraction
21,384
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | ten thousands | thousands | hundreds | tens | ones |
| 2 | 1 | 6 | 7 | 2 | |
| 7 | 2 | ||||
| - | 2 | 1 | 6 | ||
2. Subtract the numbers using long subtraction method
Because the upper digit (2) in the ones 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 (12).
| Place value | ten thousands | thousands | hundreds | tens | ones |
| 6 | 12 | ||||
| 2 | 1 | 6 | 7 | 2 | |
| 7 | 2 | ||||
| - | 2 | 1 | 6 | ||
Subtract the numbers in the ones column from the top number:
12-2-6=4
| Place value | ten thousands | thousands | hundreds | tens | ones |
| 6 | 12 | ||||
| 2 | 1 | 6 | 7 | 2 | |
| 7 | 2 | ||||
| - | 2 | 1 | 6 | ||
| 4 |
Because the upper digit (6) 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 (16).
| Place value | ten thousands | thousands | hundreds | tens | ones |
| 5 | 16 | ||||
| 6 | 12 | ||||
| 2 | 1 | 6 | 7 | 2 | |
| 7 | 2 | ||||
| - | 2 | 1 | 6 | ||
| 4 |
Subtract the numbers in the tens column from the top number:
16-7-1=8
| Place value | ten thousands | thousands | hundreds | tens | ones |
| 5 | 16 | ||||
| 6 | 12 | ||||
| 2 | 1 | 6 | 7 | 2 | |
| 7 | 2 | ||||
| - | 2 | 1 | 6 | ||
| 8 | 4 |
Subtract the numbers in the hundreds column from the top number:
5-2=3
| Place value | ten thousands | thousands | hundreds | tens | ones |
| 5 | 16 | ||||
| 6 | 12 | ||||
| 2 | 1 | 6 | 7 | 2 | |
| 7 | 2 | ||||
| - | 2 | 1 | 6 | ||
| 3 | 8 | 4 |
Write 1 in the thousands place.
| Place value | ten thousands | thousands | hundreds | tens | ones |
| 5 | 16 | ||||
| 6 | 12 | ||||
| 2 | 1 | 6 | 7 | 2 | |
| 7 | 2 | ||||
| - | 2 | 1 | 6 | ||
| 1 | 3 | 8 | 4 |
Write 2 in the ten thousands place.
| Place value | ten thousands | thousands | hundreds | tens | ones |
| 5 | 16 | ||||
| 6 | 12 | ||||
| 2 | 1 | 6 | 7 | 2 | |
| 7 | 2 | ||||
| - | 2 | 1 | 6 | ||
| 2 | 1 | 3 | 8 | 4 |
The solution is: 21,384
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