Soluzione - Long subtraction
Spiegazione passo passo
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| 5 | 0 | 0 | , | 8 | 4 | |
| - | 2 | 4 | 5 | , | 9 | 5 |
| , |
2. Subtract the numbers using long subtraction method
Because the upper digit (4) in the hundredths column is too small to get a positive difference, borrow 1 from the digit (8) in the next number place which becomes (7) and get (14).
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| 7 | 14 | |||||
| 5 | 0 | 0 | , | 8 | 4 | |
| - | 2 | 4 | 5 | , | 9 | 5 |
| , |
Subtract the numbers in the hundredths column from the top number:
14-5=9
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| 7 | 14 | |||||
| 5 | 0 | 0 | , | 8 | 4 | |
| - | 2 | 4 | 5 | , | 9 | 5 |
| , | 9 |
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 (500) which becomes (499) and get (17).
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| 4 | 9 | 17 | ||||
| 7 | 14 | |||||
| 5 | 0 | 0 | , | 8 | 4 | |
| - | 2 | 4 | 5 | , | 9 | 5 |
| , | 9 |
Subtract the numbers in the tenths column from the top number:
17-9=8
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| 4 | 9 | 17 | ||||
| 7 | 14 | |||||
| 5 | 0 | 0 | , | 8 | 4 | |
| - | 2 | 4 | 5 | , | 9 | 5 |
| , | 8 | 9 |
Subtract the numbers in the ones column from the top number:
9-5=4
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| 4 | 9 | 17 | ||||
| 7 | 14 | |||||
| 5 | 0 | 0 | , | 8 | 4 | |
| - | 2 | 4 | 5 | , | 9 | 5 |
| 4 | , | 8 | 9 |
Subtract the numbers in the tens column from the top number:
9-4=5
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| 4 | 9 | 17 | ||||
| 7 | 14 | |||||
| 5 | 0 | 0 | , | 8 | 4 | |
| - | 2 | 4 | 5 | , | 9 | 5 |
| 5 | 4 | , | 8 | 9 |
Subtract the numbers in the hundreds column from the top number:
4-2=2
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| 4 | 9 | 17 | ||||
| 7 | 14 | |||||
| 5 | 0 | 0 | , | 8 | 4 | |
| - | 2 | 4 | 5 | , | 9 | 5 |
| 2 | 5 | 4 | , | 8 | 9 |
The solution is: 254,89
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