คำตอบ - Long subtraction
8.553
คำอธิบายทีละขั้นตอน
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | ones | . | tenths | hundredths | thousandths |
| 8 | . | 6 | |||
| - | 0 | . | 0 | 4 | 7 |
| . |
Put zeros in the blank number places:
| Place value | ones | . | tenths | hundredths | thousandths |
| 8 | . | 6 | 0 | 0 | |
| - | 0 | . | 0 | 4 | 7 |
| . |
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 number to the left (60) which becomes (59) and get (10).
| Place value | ones | . | tenths | hundredths | thousandths |
| 5 | 9 | 10 | |||
| 8 | . | 6 | 0 | 0 | |
| - | 0 | . | 0 | 4 | 7 |
| . |
Subtract the numbers in the thousandths column from the top number:
10-0-7=3
| Place value | ones | . | tenths | hundredths | thousandths |
| 5 | 9 | 10 | |||
| 8 | . | 6 | 0 | 0 | |
| - | 0 | . | 0 | 4 | 7 |
| . | 3 |
Subtract the numbers in the hundredths column from the top number:
9-4=5
| Place value | ones | . | tenths | hundredths | thousandths |
| 5 | 9 | 10 | |||
| 8 | . | 6 | 0 | 0 | |
| - | 0 | . | 0 | 4 | 7 |
| . | 5 | 3 |
Subtract the numbers in the tenths column from the top number:
5-0=5
| Place value | ones | . | tenths | hundredths | thousandths |
| 5 | 9 | 10 | |||
| 8 | . | 6 | 0 | 0 | |
| - | 0 | . | 0 | 4 | 7 |
| . | 5 | 5 | 3 |
Subtract the numbers in the ones column from the top number:
8-0=8
| Place value | ones | . | tenths | hundredths | thousandths |
| 5 | 9 | 10 | |||
| 8 | . | 6 | 0 | 0 | |
| - | 0 | . | 0 | 4 | 7 |
| 8 | . | 5 | 5 | 3 |
The solution is: 8.553
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