Soluzione - Long subtraction
10,83
Spiegazione passo passo
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | tens | ones | . | tenths | hundredths |
| 4 | 0 | , | 7 | 5 | |
| - | 2 | 9 | , | 9 | 2 |
| , |
2. Subtract the numbers using long subtraction method
Subtract the numbers in the hundredths column from the top number:
5-2=3
| Place value | tens | ones | . | tenths | hundredths |
| 4 | 0 | , | 7 | 5 | |
| - | 2 | 9 | , | 9 | 2 |
| , | 3 |
Because the upper digit (7) in the tenths column is too small to get a positive difference, borrow 1 from the number to the left (40) which becomes (39) and get (17).
| Place value | tens | ones | . | tenths | hundredths |
| 3 | 17 | ||||
| 4 | 0 | , | 7 | 5 | |
| - | 2 | 9 | , | 9 | 2 |
| , | 3 |
Subtract the numbers in the tenths column from the top number:
17-9=8
| Place value | tens | ones | . | tenths | hundredths |
| 3 | 17 | ||||
| 4 | 0 | , | 7 | 5 | |
| - | 2 | 9 | , | 9 | 2 |
| , | 8 | 3 |
Subtract the numbers in the ones column from the top number:
9-9=0
| Place value | tens | ones | . | tenths | hundredths |
| 3 | 17 | ||||
| 4 | 0 | , | 7 | 5 | |
| - | 2 | 9 | , | 9 | 2 |
| 0 | , | 8 | 3 |
Subtract the numbers in the tens column from the top number:
3-2=1
| Place value | tens | ones | . | tenths | hundredths |
| 3 | 17 | ||||
| 4 | 0 | , | 7 | 5 | |
| - | 2 | 9 | , | 9 | 2 |
| 1 | 0 | , | 8 | 3 |
The solution is: 10,83
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