Solution - Long subtraction
8.1
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | ones | . | tenths | hundredths |
| 9 | . | 1 | 7 | |
| - | 1 | . | 0 | 7 |
| . |
2. Subtract the numbers using long subtraction method
Subtract the numbers in the hundredths column from the top number:
7-7=0
| Place value | ones | . | tenths | hundredths |
| 9 | . | 1 | 7 | |
| - | 1 | . | 0 | 7 |
| . | 0 |
Subtract the numbers in the tenths column from the top number:
1-0=1
| Place value | ones | . | tenths | hundredths |
| 9 | . | 1 | 7 | |
| - | 1 | . | 0 | 7 |
| . | 1 | 0 |
Subtract the numbers in the ones column from the top number:
9-1=8
| Place value | ones | . | tenths | hundredths |
| 9 | . | 1 | 7 | |
| - | 1 | . | 0 | 7 |
| 8 | . | 1 | 0 |
The solution is: 8.1
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