Soluzione - Long subtraction
2,45
Spiegazione passo passo
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | ones | . | tenths | hundredths |
| 7 | , | 0 | 5 | |
| - | 4 | , | 6 | |
| , |
Put zeros in the blank number places:
| Place value | ones | . | tenths | hundredths |
| 7 | , | 0 | 5 | |
| - | 4 | , | 6 | 0 |
| , |
2. Subtract the numbers using long subtraction method
Subtract the numbers in the hundredths column from the top number:
5-0=5
| Place value | ones | . | tenths | hundredths |
| 7 | , | 0 | 5 | |
| - | 4 | , | 6 | 0 |
| , | 5 |
Because the upper digit (0) in the tenths column is too small to get a positive difference, borrow 1 from the digit (7) in the next number place which becomes (6) and get (10).
| Place value | ones | . | tenths | hundredths |
| 6 | 10 | |||
| 7 | , | 0 | 5 | |
| - | 4 | , | 6 | 0 |
| , | 5 |
Subtract the numbers in the tenths column from the top number:
10-6=4
| Place value | ones | . | tenths | hundredths |
| 6 | 10 | |||
| 7 | , | 0 | 5 | |
| - | 4 | , | 6 | 0 |
| , | 4 | 5 |
Subtract the numbers in the ones column from the top number:
6-4=2
| Place value | ones | . | tenths | hundredths |
| 6 | 10 | |||
| 7 | , | 0 | 5 | |
| - | 4 | , | 6 | 0 |
| 2 | , | 4 | 5 |
The solution is: 2,45
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