คำตอบ - Long subtraction
89.559
คำอธิบายทีละขั้นตอน
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 8 | 9 | . | 5 | 6 | ||
| - | 0 | . | 0 | 0 | 1 | |
| . |
Put zeros in the blank number places:
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 8 | 9 | . | 5 | 6 | 0 | |
| - | 0 | . | 0 | 0 | 1 | |
| . |
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 (6) in the next number place which becomes (5) and get (10).
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 5 | 10 | |||||
| 8 | 9 | . | 5 | 6 | 0 | |
| - | 0 | . | 0 | 0 | 1 | |
| . |
Subtract the numbers in the thousandths column from the top number:
10-0-1=9
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 5 | 10 | |||||
| 8 | 9 | . | 5 | 6 | 0 | |
| - | 0 | . | 0 | 0 | 1 | |
| . | 9 |
Subtract the numbers in the hundredths column from the top number:
5-0=5
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 5 | 10 | |||||
| 8 | 9 | . | 5 | 6 | 0 | |
| - | 0 | . | 0 | 0 | 1 | |
| . | 5 | 9 |
Subtract the numbers in the tenths column from the top number:
5-0=5
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 5 | 10 | |||||
| 8 | 9 | . | 5 | 6 | 0 | |
| - | 0 | . | 0 | 0 | 1 | |
| . | 5 | 5 | 9 |
Subtract the numbers in the ones column from the top number:
9-0=9
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 5 | 10 | |||||
| 8 | 9 | . | 5 | 6 | 0 | |
| - | 0 | . | 0 | 0 | 1 | |
| 9 | . | 5 | 5 | 9 |
Write 8 in the tens place.
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 5 | 10 | |||||
| 8 | 9 | . | 5 | 6 | 0 | |
| - | 0 | . | 0 | 0 | 1 | |
| 8 | 9 | . | 5 | 5 | 9 |
The solution is: 89.559
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