Vertically align numbers with Larger Number on top:
| 1 | 1 | . | 0 | |
| − | 5 | . | 5 |
Subtract using place value:
| Tens | Ones | Tenths | ||
|---|---|---|---|---|
| 10 | ||||
| 0 | 0 | 10 | ||
| 11 | 1 | 1 | . | 0 |
| 5.5 | 5 | . | 5 | |
| Difference | 5 | . | 5 |
Column traversal from right to left
Tenths column:
Tenths column:
- Since 0 is less than 5, we have to borrow 1 from the Ones column
- As a result, 0 becomes 10, and 10 − 5 = 5
- The 1 in the Ones column becomes 0
Ones column:
- Since 0 is less than 5, we have to borrow 1 from the Tens column
- As a result, 0 becomes 10, and 10 − 5 = 5
- The 1 in the Tens column becomes 0
Tens column:
- 0 − 0 = 0
Note: Leading zero is dropped
| 10 | ||||
| 0 | 0 | 10 | ||
| 1 | 1 | . | 0 | |
| − | 5 | . | 5 | |
| 5 | . | 5 |
Therefore, the Difference between 11 and 5.5 is 5.5
Check computation by comparing Larger Number and the Sum of Difference and Smaller Number:
| 1 | 1 | |||
| 5 | . | 5 | ||
| 5 | . | 5 | ||
| 1 | 1 | . | 0 |
Sum of Difference and Smaller Number = 11 (trailing zero is dropped)
Sum of Difference and Smaller Number = Larger Number (11 = 11) ✓
