Soluzione - Long subtraction
27,68
Spiegazione passo passo
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | tens | ones | . | tenths | hundredths |
| 5 | 2 | , | 0 | 3 | |
| - | 2 | 4 | , | 3 | 5 |
| , |
2. Subtract the numbers using long subtraction method
Because the upper digit (3) in the hundredths column is too small to get a positive difference, borrow 1 from the number to the left (2.0) which becomes (1.9) and get (13).
| Place value | tens | ones | . | tenths | hundredths |
| 1 | 9 | 13 | |||
| 5 | 2 | , | 0 | 3 | |
| - | 2 | 4 | , | 3 | 5 |
| , |
Subtract the numbers in the hundredths column from the top number:
13-5=8
| Place value | tens | ones | . | tenths | hundredths |
| 1 | 9 | 13 | |||
| 5 | 2 | , | 0 | 3 | |
| - | 2 | 4 | , | 3 | 5 |
| , | 8 |
Subtract the numbers in the tenths column from the top number:
9-3=6
| Place value | tens | ones | . | tenths | hundredths |
| 1 | 9 | 13 | |||
| 5 | 2 | , | 0 | 3 | |
| - | 2 | 4 | , | 3 | 5 |
| , | 6 | 8 |
Because the upper digit (1) in the ones 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 (11).
| Place value | tens | ones | . | tenths | hundredths |
| 4 | 11 | ||||
| 1 | 9 | 13 | |||
| 5 | 2 | , | 0 | 3 | |
| - | 2 | 4 | , | 3 | 5 |
| , | 6 | 8 |
Subtract the numbers in the ones column from the top number:
11-4=7
| Place value | tens | ones | . | tenths | hundredths |
| 4 | 11 | ||||
| 1 | 9 | 13 | |||
| 5 | 2 | , | 0 | 3 | |
| - | 2 | 4 | , | 3 | 5 |
| 7 | , | 6 | 8 |
Subtract the numbers in the tens column from the top number:
4-2=2
| Place value | tens | ones | . | tenths | hundredths |
| 4 | 11 | ||||
| 1 | 9 | 13 | |||
| 5 | 2 | , | 0 | 3 | |
| - | 2 | 4 | , | 3 | 5 |
| 2 | 7 | , | 6 | 8 |
The solution is: 27,68
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