Solution - Long subtraction
10.5
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | tens | ones | . | tenths |
| 1 | 7 | . | 8 | |
| 2 | ||||
| - | 5 | . | 3 | |
| . |
Put zeros in the blank number places:
| Place value | tens | ones | . | tenths |
| 1 | 7 | . | 8 | |
| 2 | . | 0 | ||
| - | 5 | . | 3 | |
| . |
2. Subtract the numbers using long subtraction method
Subtract the numbers in the tenths column from the top number:
8-0-3=5
| Place value | tens | ones | . | tenths |
| 1 | 7 | . | 8 | |
| 2 | . | 0 | ||
| - | 5 | . | 3 | |
| . | 5 |
Subtract the numbers in the ones column from the top number:
7-2-5=0
| Place value | tens | ones | . | tenths |
| 1 | 7 | . | 8 | |
| 2 | . | 0 | ||
| - | 5 | . | 3 | |
| 0 | . | 5 |
Write 1 in the tens place.
| Place value | tens | ones | . | tenths |
| 1 | 7 | . | 8 | |
| 2 | . | 0 | ||
| - | 5 | . | 3 | |
| 1 | 0 | . | 5 |
The solution is: 10.5
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