Solution - Long subtraction
11,940
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 | 4 | 0 | 0 | 0 | |
| - | 1 | 2 | 0 | 6 | 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 | ten thousands | thousands | hundreds | tens | ones |
| 2 | 4 | 0 | 0 | 0 | |
| - | 1 | 2 | 0 | 6 | 0 |
| 0 |
Because the upper digit (0) in the tens column is too small to get a positive difference, borrow 1 from the number to the left (40) which becomes (39) and get (10).
| Place value | ten thousands | thousands | hundreds | tens | ones |
| 3 | 9 | 10 | |||
| 2 | 4 | 0 | 0 | 0 | |
| - | 1 | 2 | 0 | 6 | 0 |
| 0 |
Subtract the numbers in the tens column from the top number:
10-6=4
| Place value | ten thousands | thousands | hundreds | tens | ones |
| 3 | 9 | 10 | |||
| 2 | 4 | 0 | 0 | 0 | |
| - | 1 | 2 | 0 | 6 | 0 |
| 4 | 0 |
Subtract the numbers in the hundreds column from the top number:
9-0=9
| Place value | ten thousands | thousands | hundreds | tens | ones |
| 3 | 9 | 10 | |||
| 2 | 4 | 0 | 0 | 0 | |
| - | 1 | 2 | 0 | 6 | 0 |
| 9 | 4 | 0 |
Subtract the numbers in the thousands column from the top number:
3-2=1
| Place value | ten thousands | thousands | hundreds | tens | ones |
| 3 | 9 | 10 | |||
| 2 | 4 | 0 | 0 | 0 | |
| - | 1 | 2 | 0 | 6 | 0 |
| 1 | 9 | 4 | 0 |
Subtract the numbers in the ten thousands column from the top number:
2-1=1
| Place value | ten thousands | thousands | hundreds | tens | ones |
| 3 | 9 | 10 | |||
| 2 | 4 | 0 | 0 | 0 | |
| - | 1 | 2 | 0 | 6 | 0 |
| 1 | 1 | 9 | 4 | 0 |
The solution is: 11,940
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