Soluzione - Long subtraction
27,49
Spiegazione passo passo
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | tens | ones | . | tenths | hundredths |
| 7 | 2 | , | 7 | 2 | |
| - | 4 | 5 | , | 2 | 3 |
| , |
2. Subtract the numbers using long subtraction method
Because the upper digit (2) in the hundredths 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 (12).
| Place value | tens | ones | . | tenths | hundredths |
| 6 | 12 | ||||
| 7 | 2 | , | 7 | 2 | |
| - | 4 | 5 | , | 2 | 3 |
| , |
Subtract the numbers in the hundredths column from the top number:
12-3=9
| Place value | tens | ones | . | tenths | hundredths |
| 6 | 12 | ||||
| 7 | 2 | , | 7 | 2 | |
| - | 4 | 5 | , | 2 | 3 |
| , | 9 |
Subtract the numbers in the tenths column from the top number:
6-2=4
| Place value | tens | ones | . | tenths | hundredths |
| 6 | 12 | ||||
| 7 | 2 | , | 7 | 2 | |
| - | 4 | 5 | , | 2 | 3 |
| , | 4 | 9 |
Because the upper digit (2) in the ones 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 (12).
| Place value | tens | ones | . | tenths | hundredths |
| 6 | 12 | ||||
| 6 | 12 | ||||
| 7 | 2 | , | 7 | 2 | |
| - | 4 | 5 | , | 2 | 3 |
| , | 4 | 9 |
Subtract the numbers in the ones column from the top number:
12-5=7
| Place value | tens | ones | . | tenths | hundredths |
| 6 | 12 | ||||
| 6 | 12 | ||||
| 7 | 2 | , | 7 | 2 | |
| - | 4 | 5 | , | 2 | 3 |
| 7 | , | 4 | 9 |
Subtract the numbers in the tens column from the top number:
6-4=2
| Place value | tens | ones | . | tenths | hundredths |
| 6 | 12 | ||||
| 6 | 12 | ||||
| 7 | 2 | , | 7 | 2 | |
| - | 4 | 5 | , | 2 | 3 |
| 2 | 7 | , | 4 | 9 |
The solution is: 27,49
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