Solution - Long subtraction
45
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | tens | ones |
| 8 | 5 | |
| 2 | 3 | |
| - | 1 | 7 |
2. Subtract the numbers using long subtraction method
Because the upper digit (5) in the ones 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 (15).
| Place value | tens | ones |
| 7 | 15 | |
| 8 | 5 | |
| 2 | 3 | |
| - | 1 | 7 |
Subtract the numbers in the ones column from the top number:
15-3-7=5
| Place value | tens | ones |
| 7 | 15 | |
| 8 | 5 | |
| 2 | 3 | |
| - | 1 | 7 |
| 5 |
Subtract the numbers in the tens column from the top number:
7-2-1=4
| Place value | tens | ones |
| 7 | 15 | |
| 8 | 5 | |
| 2 | 3 | |
| - | 1 | 7 |
| 4 | 5 |
The solution is: 45
How did we do?
Please leave us feedback.Why learn this
Why learn this