Solution - Long subtraction
139
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | hundreds | tens | ones |
| 1 | 5 | 8 | |
| 6 | |||
| - | 1 | 3 | |
2. Subtract the numbers using long subtraction method
Because the upper digit (8) 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 (18).
| Place value | hundreds | tens | ones |
| 4 | 18 | ||
| 1 | 5 | 8 | |
| 6 | |||
| - | 1 | 3 | |
Subtract the numbers in the ones column from the top number:
18-6-3=9
| Place value | hundreds | tens | ones |
| 4 | 18 | ||
| 1 | 5 | 8 | |
| 6 | |||
| - | 1 | 3 | |
| 9 |
Subtract the numbers in the tens column from the top number:
4-1=3
| Place value | hundreds | tens | ones |
| 4 | 18 | ||
| 1 | 5 | 8 | |
| 6 | |||
| - | 1 | 3 | |
| 3 | 9 |
Write 1 in the hundreds place.
| Place value | hundreds | tens | ones |
| 4 | 18 | ||
| 1 | 5 | 8 | |
| 6 | |||
| - | 1 | 3 | |
| 1 | 3 | 9 |
The solution is: 139
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