Megoldás - Long subtraction
10,5
Lépésről lépésre magyarázat
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | tens | ones | . | tenths |
| 1 | 5 | , | 2 | |
| 1 | ||||
| - | 3 | , | 7 | |
| , |
Put zeros in the blank number places:
| Place value | tens | ones | . | tenths |
| 1 | 5 | , | 2 | |
| 1 | , | 0 | ||
| - | 3 | , | 7 | |
| , |
2. Subtract the numbers using long subtraction method
Because the upper digit (2) in the tenths column is too small to get a positive difference, borrow 1 from the digit (5) in the next number place which becomes (4) and get (12).
| Place value | tens | ones | . | tenths |
| 4 | 12 | |||
| 1 | 5 | , | 2 | |
| 1 | , | 0 | ||
| - | 3 | , | 7 | |
| , |
Subtract the numbers in the tenths column from the top number:
12-0-7=5
| Place value | tens | ones | . | tenths |
| 4 | 12 | |||
| 1 | 5 | , | 2 | |
| 1 | , | 0 | ||
| - | 3 | , | 7 | |
| , | 5 |
Subtract the numbers in the ones column from the top number:
4-1-3=0
| Place value | tens | ones | . | tenths |
| 4 | 12 | |||
| 1 | 5 | , | 2 | |
| 1 | , | 0 | ||
| - | 3 | , | 7 | |
| 0 | , | 5 |
Write 1 in the tens place.
| Place value | tens | ones | . | tenths |
| 4 | 12 | |||
| 1 | 5 | , | 2 | |
| 1 | , | 0 | ||
| - | 3 | , | 7 | |
| 1 | 0 | , | 5 |
The solution is: 10,5
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