Solution - Long subtraction
36
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | hundreds | tens | ones |
| 2 | 1 | 0 | |
| - | 1 | 7 | 4 |
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 (1) in the next number place which becomes (0) and get (10).
| Place value | hundreds | tens | ones |
| 0 | 10 | ||
| 2 | 1 | 0 | |
| - | 1 | 7 | 4 |
Subtract the numbers in the ones column from the top number:
10-4=6
| Place value | hundreds | tens | ones |
| 0 | 10 | ||
| 2 | 1 | 0 | |
| - | 1 | 7 | 4 |
| 6 |
Because the upper digit (0) in the tens 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 (10).
| Place value | hundreds | tens | ones |
| 1 | 10 | ||
| 0 | 10 | ||
| 2 | 1 | 0 | |
| - | 1 | 7 | 4 |
| 6 |
Subtract the numbers in the tens column from the top number:
10-7=3
| Place value | hundreds | tens | ones |
| 1 | 10 | ||
| 0 | 10 | ||
| 2 | 1 | 0 | |
| - | 1 | 7 | 4 |
| 3 | 6 |
Subtract the numbers in the hundreds column from the top number:
1-1=0
| Place value | hundreds | tens | ones |
| 1 | 10 | ||
| 0 | 10 | ||
| 2 | 1 | 0 | |
| - | 1 | 7 | 4 |
| 0 | 3 | 6 |
The solution is: 36
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