Solution - Long subtraction
1.3
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | ones | . | tenths |
| 8 | . | 3 | |
| 5 | . | 1 | |
| - | 1 | . | 9 |
| . |
2. Subtract the numbers using long subtraction method
Because the upper digit (3) in the tenths column is too small to get a positive difference, borrow 1 from the digit (8) in the next number place which becomes (7) and get (13).
| Place value | ones | . | tenths |
| 7 | 13 | ||
| 8 | . | 3 | |
| 5 | . | 1 | |
| - | 1 | . | 9 |
| . |
Subtract the numbers in the tenths column from the top number:
13-1-9=3
| Place value | ones | . | tenths |
| 7 | 13 | ||
| 8 | . | 3 | |
| 5 | . | 1 | |
| - | 1 | . | 9 |
| . | 3 |
Subtract the numbers in the ones column from the top number:
7-5-1=1
| Place value | ones | . | tenths |
| 7 | 13 | ||
| 8 | . | 3 | |
| 5 | . | 1 | |
| - | 1 | . | 9 |
| 1 | . | 3 |
The solution is: 1.3
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