คำตอบ - Long subtraction
83.316
คำอธิบายทีละขั้นตอน
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 8 | 3 | . | 9 | |||
| - | 0 | . | 5 | 8 | 4 | |
| . |
Put zeros in the blank number places:
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 8 | 3 | . | 9 | 0 | 0 | |
| - | 0 | . | 5 | 8 | 4 | |
| . |
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 (90) which becomes (89) and get (10).
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 8 | 9 | 10 | ||||
| 8 | 3 | . | 9 | 0 | 0 | |
| - | 0 | . | 5 | 8 | 4 | |
| . |
Subtract the numbers in the thousandths column from the top number:
10-0-4=6
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 8 | 9 | 10 | ||||
| 8 | 3 | . | 9 | 0 | 0 | |
| - | 0 | . | 5 | 8 | 4 | |
| . | 6 |
Subtract the numbers in the hundredths column from the top number:
9-8=1
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 8 | 9 | 10 | ||||
| 8 | 3 | . | 9 | 0 | 0 | |
| - | 0 | . | 5 | 8 | 4 | |
| . | 1 | 6 |
Subtract the numbers in the tenths column from the top number:
8-5=3
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 8 | 9 | 10 | ||||
| 8 | 3 | . | 9 | 0 | 0 | |
| - | 0 | . | 5 | 8 | 4 | |
| . | 3 | 1 | 6 |
Subtract the numbers in the ones column from the top number:
3-0=3
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 8 | 9 | 10 | ||||
| 8 | 3 | . | 9 | 0 | 0 | |
| - | 0 | . | 5 | 8 | 4 | |
| 3 | . | 3 | 1 | 6 |
Write 8 in the tens place.
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 8 | 9 | 10 | ||||
| 8 | 3 | . | 9 | 0 | 0 | |
| - | 0 | . | 5 | 8 | 4 | |
| 8 | 3 | . | 3 | 1 | 6 |
The solution is: 83.316
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