Vertically align numbers with Larger Number on top:
| 4 | 3 | |
| − | 3 | 1 |
Subtract using place value:
| Tens | Ones | |
|---|---|---|
| 43 | 4 | 3 |
| 31 | 3 | 1 |
| Difference | 1 | 2 |
Column traversal from right to left
Ones column:
Ones column:
- 3 − 1 = 2
Tens column:
- 4 − 3 = 1
| 4 | 3 | |
| − | 3 | 1 |
| 1 | 2 |
Therefore, the Difference between 43 and 31 is 12
Check computation by comparing Larger Number and the Sum of Smaller Number and Difference:
| 3 | 1 | |
| 1 | 2 | |
| 4 | 3 |
Sum of Smaller Number and Difference = 43
Sum of Smaller Number and Difference = Larger Number (43 = 43) ✓
