Vertically align numbers with Larger Number on top:
| 2 | 2 | |
| − | 7 |
Subtract using place value:
| Tens | Ones | |
|---|---|---|
| 1 | 12 | |
| 22 | 2 | 2 |
| 7 | 7 | |
| Difference | 1 | 5 |
Column traversal from right to left
Ones column:
Ones column:
- Since 2 is less than 7, we have to borrow 1 from the Tens column
- As a result, 2 becomes 12, and 12 − 7 = 5
- The 2 in the Tens column becomes 1
Tens column:
- 1 − 0 = 1
| 1 | 12 | |
| 2 | 2 | |
| − | 7 | |
| 1 | 5 |
Therefore, the Difference between 22 and 7 is 15
Check computation by comparing Larger Number and the Sum of Difference and Smaller Number:
| 1 | ||
| 1 | 5 | |
| 7 | ||
| 2 | 2 |
Sum of Difference and Smaller Number = 22
Sum of Difference and Smaller Number = Larger Number (22 = 22) ✓
