Solution - Long subtraction
6.575
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | ones | . | tenths | hundredths | thousandths |
| 9 | . | 7 | 4 | 5 | |
| - | 3 | . | 1 | 7 | |
| . |
Put zeros in the blank number places:
| Place value | ones | . | tenths | hundredths | thousandths |
| 9 | . | 7 | 4 | 5 | |
| - | 3 | . | 1 | 7 | 0 |
| . |
2. Subtract the numbers using long subtraction method
Subtract the numbers in the thousandths column from the top number:
5-0=5
| Place value | ones | . | tenths | hundredths | thousandths |
| 9 | . | 7 | 4 | 5 | |
| - | 3 | . | 1 | 7 | 0 |
| . | 5 |
Because the upper digit (4) in the hundredths column is too small to get a positive difference, borrow 1 from the digit (7) in the next number place which becomes (6) and get (14).
| Place value | ones | . | tenths | hundredths | thousandths |
| 6 | 14 | ||||
| 9 | . | 7 | 4 | 5 | |
| - | 3 | . | 1 | 7 | 0 |
| . | 5 |
Subtract the numbers in the hundredths column from the top number:
14-7=7
| Place value | ones | . | tenths | hundredths | thousandths |
| 6 | 14 | ||||
| 9 | . | 7 | 4 | 5 | |
| - | 3 | . | 1 | 7 | 0 |
| . | 7 | 5 |
Subtract the numbers in the tenths column from the top number:
6-1=5
| Place value | ones | . | tenths | hundredths | thousandths |
| 6 | 14 | ||||
| 9 | . | 7 | 4 | 5 | |
| - | 3 | . | 1 | 7 | 0 |
| . | 5 | 7 | 5 |
Subtract the numbers in the ones column from the top number:
9-3=6
| Place value | ones | . | tenths | hundredths | thousandths |
| 6 | 14 | ||||
| 9 | . | 7 | 4 | 5 | |
| - | 3 | . | 1 | 7 | 0 |
| 6 | . | 5 | 7 | 5 |
The solution is: 6.575
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