Solution - Long subtraction
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | hundreds | tens | ones | . | tenths | hundredths | thousandths |
| 6 | 8 | 4 | . | 3 | 9 | 2 | |
| - | 6 | 2 | . | 2 | 9 | 7 | |
| . |
2. Subtract the numbers using long subtraction method
Because the upper digit (2) in the thousandths column is too small to get a positive difference, borrow 1 from the digit (9) in the next number place which becomes (8) and get (12).
| Place value | hundreds | tens | ones | . | tenths | hundredths | thousandths |
| 8 | 12 | ||||||
| 6 | 8 | 4 | . | 3 | 9 | 2 | |
| - | 6 | 2 | . | 2 | 9 | 7 | |
| . |
Subtract the numbers in the thousandths column from the top number:
12-7=5
| Place value | hundreds | tens | ones | . | tenths | hundredths | thousandths |
| 8 | 12 | ||||||
| 6 | 8 | 4 | . | 3 | 9 | 2 | |
| - | 6 | 2 | . | 2 | 9 | 7 | |
| . | 5 |
Because the upper digit (8) in the hundredths column is too small to get a positive difference, borrow 1 from the digit (3) in the next number place which becomes (2) and get (18).
| Place value | hundreds | tens | ones | . | tenths | hundredths | thousandths |
| 2 | 18 | ||||||
| 8 | 12 | ||||||
| 6 | 8 | 4 | . | 3 | 9 | 2 | |
| - | 6 | 2 | . | 2 | 9 | 7 | |
| . | 5 |
Subtract the numbers in the hundredths column from the top number:
18-9=9
| Place value | hundreds | tens | ones | . | tenths | hundredths | thousandths |
| 2 | 18 | ||||||
| 8 | 12 | ||||||
| 6 | 8 | 4 | . | 3 | 9 | 2 | |
| - | 6 | 2 | . | 2 | 9 | 7 | |
| . | 9 | 5 |
Subtract the numbers in the tenths column from the top number:
2-2=0
| Place value | hundreds | tens | ones | . | tenths | hundredths | thousandths |
| 2 | 18 | ||||||
| 8 | 12 | ||||||
| 6 | 8 | 4 | . | 3 | 9 | 2 | |
| - | 6 | 2 | . | 2 | 9 | 7 | |
| . | 0 | 9 | 5 |
Subtract the numbers in the ones column from the top number:
4-2=2
| Place value | hundreds | tens | ones | . | tenths | hundredths | thousandths |
| 2 | 18 | ||||||
| 8 | 12 | ||||||
| 6 | 8 | 4 | . | 3 | 9 | 2 | |
| - | 6 | 2 | . | 2 | 9 | 7 | |
| 2 | . | 0 | 9 | 5 |
Subtract the numbers in the tens column from the top number:
8-6=2
| Place value | hundreds | tens | ones | . | tenths | hundredths | thousandths |
| 2 | 18 | ||||||
| 8 | 12 | ||||||
| 6 | 8 | 4 | . | 3 | 9 | 2 | |
| - | 6 | 2 | . | 2 | 9 | 7 | |
| 2 | 2 | . | 0 | 9 | 5 |
Write 6 in the hundreds place.
| Place value | hundreds | tens | ones | . | tenths | hundredths | thousandths |
| 2 | 18 | ||||||
| 8 | 12 | ||||||
| 6 | 8 | 4 | . | 3 | 9 | 2 | |
| - | 6 | 2 | . | 2 | 9 | 7 | |
| 6 | 2 | 2 | . | 0 | 9 | 5 |
The solution is: 622.095
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