Solution - Long subtraction
3.8
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | ones | . | tenths |
| 6 | . | 9 | |
| 0 | . | 9 | |
| - | 2 | . | 2 |
| . |
2. Subtract the numbers using long subtraction method
Because the upper digit (9) in the tenths column is too small to get a positive difference, borrow 1 from the digit (6) in the next number place which becomes (5) and get (19).
| Place value | ones | . | tenths |
| 5 | 19 | ||
| 6 | . | 9 | |
| 0 | . | 9 | |
| - | 2 | . | 2 |
| . |
Subtract the numbers in the tenths column from the top number:
19-9-2=8
| Place value | ones | . | tenths |
| 5 | 19 | ||
| 6 | . | 9 | |
| 0 | . | 9 | |
| - | 2 | . | 2 |
| . | 8 |
Subtract the numbers in the ones column from the top number:
5-0-2=3
| Place value | ones | . | tenths |
| 5 | 19 | ||
| 6 | . | 9 | |
| 0 | . | 9 | |
| - | 2 | . | 2 |
| 3 | . | 8 |
The solution is: 3.8
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