Solution - Long subtraction
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 6 | 8 | . | 2 | 7 | ||
| - | 5 | 9 | . | 5 | 6 | 9 |
| . |
Put zeros in the blank number places:
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 6 | 8 | . | 2 | 7 | 0 | |
| - | 5 | 9 | . | 5 | 6 | 9 |
| . |
2. Subtract the numbers using long subtraction method
Because the upper digit (0) in the thousandths 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 (10).
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 6 | 10 | |||||
| 6 | 8 | . | 2 | 7 | 0 | |
| - | 5 | 9 | . | 5 | 6 | 9 |
| . |
Subtract the numbers in the thousandths column from the top number:
10-0-9=1
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 6 | 10 | |||||
| 6 | 8 | . | 2 | 7 | 0 | |
| - | 5 | 9 | . | 5 | 6 | 9 |
| . | 1 |
Subtract the numbers in the hundredths column from the top number:
6-6=0
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 6 | 10 | |||||
| 6 | 8 | . | 2 | 7 | 0 | |
| - | 5 | 9 | . | 5 | 6 | 9 |
| . | 0 | 1 |
Because the upper digit (2) 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 (12).
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 7 | 12 | |||||
| 6 | 10 | |||||
| 6 | 8 | . | 2 | 7 | 0 | |
| - | 5 | 9 | . | 5 | 6 | 9 |
| . | 0 | 1 |
Subtract the numbers in the tenths column from the top number:
12-5=7
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 7 | 12 | |||||
| 6 | 10 | |||||
| 6 | 8 | . | 2 | 7 | 0 | |
| - | 5 | 9 | . | 5 | 6 | 9 |
| . | 7 | 0 | 1 |
Because the upper digit (7) in the ones 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 (17).
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 5 | 17 | |||||
| 7 | 12 | |||||
| 6 | 10 | |||||
| 6 | 8 | . | 2 | 7 | 0 | |
| - | 5 | 9 | . | 5 | 6 | 9 |
| . | 7 | 0 | 1 |
Subtract the numbers in the ones column from the top number:
17-9=8
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 5 | 17 | |||||
| 7 | 12 | |||||
| 6 | 10 | |||||
| 6 | 8 | . | 2 | 7 | 0 | |
| - | 5 | 9 | . | 5 | 6 | 9 |
| 8 | . | 7 | 0 | 1 |
Subtract the numbers in the tens column from the top number:
5-5=0
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 5 | 17 | |||||
| 7 | 12 | |||||
| 6 | 10 | |||||
| 6 | 8 | . | 2 | 7 | 0 | |
| - | 5 | 9 | . | 5 | 6 | 9 |
| 0 | 8 | . | 7 | 0 | 1 |
The solution is: 8.701
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