Solution - Long subtraction
6.47
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | ones | . | tenths | hundredths |
| 8 | . | 4 | 6 | |
| - | 1 | . | 9 | 9 |
| . |
2. Subtract the numbers using long subtraction method
Because the upper digit (6) in the hundredths column is too small to get a positive difference, borrow 1 from the digit (4) in the next number place which becomes (3) and get (16).
| Place value | ones | . | tenths | hundredths |
| 3 | 16 | |||
| 8 | . | 4 | 6 | |
| - | 1 | . | 9 | 9 |
| . |
Subtract the numbers in the hundredths column from the top number:
16-9=7
| Place value | ones | . | tenths | hundredths |
| 3 | 16 | |||
| 8 | . | 4 | 6 | |
| - | 1 | . | 9 | 9 |
| . | 7 |
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 | hundredths |
| 7 | 13 | |||
| 3 | 16 | |||
| 8 | . | 4 | 6 | |
| - | 1 | . | 9 | 9 |
| . | 7 |
Subtract the numbers in the tenths column from the top number:
13-9=4
| Place value | ones | . | tenths | hundredths |
| 7 | 13 | |||
| 3 | 16 | |||
| 8 | . | 4 | 6 | |
| - | 1 | . | 9 | 9 |
| . | 4 | 7 |
Subtract the numbers in the ones column from the top number:
7-1=6
| Place value | ones | . | tenths | hundredths |
| 7 | 13 | |||
| 3 | 16 | |||
| 8 | . | 4 | 6 | |
| - | 1 | . | 9 | 9 |
| 6 | . | 4 | 7 |
The solution is: 6.47
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