Soluzione - Long subtraction
8,59
Spiegazione passo passo
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | tens | ones | . | tenths | hundredths |
| 2 | 3 | , | 4 | 9 | |
| - | 1 | 4 | , | 9 | |
| , |
Put zeros in the blank number places:
| Place value | tens | ones | . | tenths | hundredths |
| 2 | 3 | , | 4 | 9 | |
| - | 1 | 4 | , | 9 | 0 |
| , |
2. Subtract the numbers using long subtraction method
Subtract the numbers in the hundredths column from the top number:
9-0=9
| Place value | tens | ones | . | tenths | hundredths |
| 2 | 3 | , | 4 | 9 | |
| - | 1 | 4 | , | 9 | 0 |
| , | 9 |
Because the upper digit (4) in the tenths column is too small to get a positive difference, borrow 1 from the digit (3) in the next number place which becomes (2) and get (14).
| Place value | tens | ones | . | tenths | hundredths |
| 2 | 14 | ||||
| 2 | 3 | , | 4 | 9 | |
| - | 1 | 4 | , | 9 | 0 |
| , | 9 |
Subtract the numbers in the tenths column from the top number:
14-9=5
| Place value | tens | ones | . | tenths | hundredths |
| 2 | 14 | ||||
| 2 | 3 | , | 4 | 9 | |
| - | 1 | 4 | , | 9 | 0 |
| , | 5 | 9 |
Because the upper digit (2) in the ones column is too small to get a positive difference, borrow 1 from the digit (2) in the next number place which becomes (1) and get (12).
| Place value | tens | ones | . | tenths | hundredths |
| 1 | 12 | ||||
| 2 | 14 | ||||
| 2 | 3 | , | 4 | 9 | |
| - | 1 | 4 | , | 9 | 0 |
| , | 5 | 9 |
Subtract the numbers in the ones column from the top number:
12-4=8
| Place value | tens | ones | . | tenths | hundredths |
| 1 | 12 | ||||
| 2 | 14 | ||||
| 2 | 3 | , | 4 | 9 | |
| - | 1 | 4 | , | 9 | 0 |
| 8 | , | 5 | 9 |
Subtract the numbers in the tens column from the top number:
1-1=0
| Place value | tens | ones | . | tenths | hundredths |
| 1 | 12 | ||||
| 2 | 14 | ||||
| 2 | 3 | , | 4 | 9 | |
| - | 1 | 4 | , | 9 | 0 |
| 0 | 8 | , | 5 | 9 |
The solution is: 8,59
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