Vertically align numbers with Larger Number on top:
| 8 | 1 | |
| − | 6 | 5 |
Subtract using place value:
| Tens | Ones | |
|---|---|---|
| 7 | 11 | |
| 81 | 8 | 1 |
| 65 | 6 | 5 |
| Difference | 1 | 6 |
Column traversal from right to left
Ones column:
Ones column:
- Since 1 is less than 5, we have to borrow 1 from the Tens column
- As a result, 1 becomes 11, and 11 − 5 = 6
- The 8 in the Tens column becomes 7
Tens column:
- 7 − 6 = 1
| 7 | 11 | |
| 8 | 1 | |
| − | 6 | 5 |
| 1 | 6 |
Therefore, the Difference between 81 and 65 is 16
Check computation by comparing Larger Number and the Sum of Smaller Number and Difference:
| 1 | ||
| 6 | 5 | |
| 1 | 6 | |
| 8 | 1 |
Sum of Smaller Number and Difference = 81
Sum of Smaller Number and Difference = Larger Number (81 = 81) ✓
