Vertically align numbers with Larger Number on top:
| 3 | 3 | |
| − | 1 | 8 |
Subtract using place value:
| Tens | Ones | |
|---|---|---|
| 2 | 13 | |
| 33 | 3 | 3 |
| 18 | 1 | 8 |
| Difference | 1 | 5 |
Column traversal from right to left
Ones column:
Ones column:
- Since 3 is less than 8, we have to borrow 1 from the Tens column
- As a result, 3 becomes 13, and 13 − 8 = 5
- The 3 in the Tens column becomes 2
Tens column:
- 2 − 1 = 1
| 2 | 13 | |
| 3 | 3 | |
| − | 1 | 8 |
| 1 | 5 |
Therefore, the Difference between 33 and 18 is 15
Check computation by comparing Larger Number and the Sum of Smaller Number and Difference:
| 1 | ||
| 1 | 8 | |
| 1 | 5 | |
| 3 | 3 |
Sum of Smaller Number and Difference = 33
Sum of Smaller Number and Difference = Larger Number (33 = 33) ✓
