Solution - Long subtraction
54
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | thousands | hundreds | tens | ones |
| 2 | 0 | 5 | 0 | |
| - | 1 | 9 | 9 | 6 |
2. Subtract the numbers using long subtraction method
Because the upper digit (0) in the ones column is too small to get a positive difference, borrow 1 from the digit (5) in the next number place which becomes (4) and get (10).
| Place value | thousands | hundreds | tens | ones |
| 4 | 10 | |||
| 2 | 0 | 5 | 0 | |
| - | 1 | 9 | 9 | 6 |
Subtract the numbers in the ones column from the top number:
10-6=4
| Place value | thousands | hundreds | tens | ones |
| 4 | 10 | |||
| 2 | 0 | 5 | 0 | |
| - | 1 | 9 | 9 | 6 |
| 4 |
Because the upper digit (4) in the tens column is too small to get a positive difference, borrow 1 from the number to the left (20) which becomes (19) and get (14).
| Place value | thousands | hundreds | tens | ones |
| 1 | 9 | 14 | ||
| 4 | 10 | |||
| 2 | 0 | 5 | 0 | |
| - | 1 | 9 | 9 | 6 |
| 4 |
Subtract the numbers in the tens column from the top number:
14-9=5
| Place value | thousands | hundreds | tens | ones |
| 1 | 9 | 14 | ||
| 4 | 10 | |||
| 2 | 0 | 5 | 0 | |
| - | 1 | 9 | 9 | 6 |
| 5 | 4 |
Subtract the numbers in the hundreds column from the top number:
9-9=0
| Place value | thousands | hundreds | tens | ones |
| 1 | 9 | 14 | ||
| 4 | 10 | |||
| 2 | 0 | 5 | 0 | |
| - | 1 | 9 | 9 | 6 |
| 0 | 5 | 4 |
Subtract the numbers in the thousands column from the top number:
1-1=0
| Place value | thousands | hundreds | tens | ones |
| 1 | 9 | 14 | ||
| 4 | 10 | |||
| 2 | 0 | 5 | 0 | |
| - | 1 | 9 | 9 | 6 |
| 0 | 0 | 5 | 4 |
The solution is: 54
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