คำตอบ - Long subtraction
15.1
คำอธิบายทีละขั้นตอน
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | tens | ones | . | tenths |
| 1 | 8 | . | 9 | |
| 0 | . | 3 | ||
| - | 3 | . | 5 | |
| . |
2. Subtract the numbers using long subtraction method
Subtract the numbers in the tenths column from the top number:
9-3-5=1
| Place value | tens | ones | . | tenths |
| 1 | 8 | . | 9 | |
| 0 | . | 3 | ||
| - | 3 | . | 5 | |
| . | 1 |
Subtract the numbers in the ones column from the top number:
8-0-3=5
| Place value | tens | ones | . | tenths |
| 1 | 8 | . | 9 | |
| 0 | . | 3 | ||
| - | 3 | . | 5 | |
| 5 | . | 1 |
Write 1 in the tens place.
| Place value | tens | ones | . | tenths |
| 1 | 8 | . | 9 | |
| 0 | . | 3 | ||
| - | 3 | . | 5 | |
| 1 | 5 | . | 1 |
The solution is: 15.1
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