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) ✓