Soluzione - Long subtraction
Spiegazione passo passo
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | tens | ones | . | tenths | hundredths |
| 4 | 6 | , | 3 | 7 | |
| - | 1 | 8 | , | 4 | 8 |
| , |
2. Subtract the numbers using long subtraction method
Because the upper digit (7) in the hundredths 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 (17).
| Place value | tens | ones | . | tenths | hundredths |
| 2 | 17 | ||||
| 4 | 6 | , | 3 | 7 | |
| - | 1 | 8 | , | 4 | 8 |
| , |
Subtract the numbers in the hundredths column from the top number:
17-8=9
| Place value | tens | ones | . | tenths | hundredths |
| 2 | 17 | ||||
| 4 | 6 | , | 3 | 7 | |
| - | 1 | 8 | , | 4 | 8 |
| , | 9 |
Because the upper digit (2) in the tenths column is too small to get a positive difference, borrow 1 from the digit (6) in the next number place which becomes (5) and get (12).
| Place value | tens | ones | . | tenths | hundredths |
| 5 | 12 | ||||
| 2 | 17 | ||||
| 4 | 6 | , | 3 | 7 | |
| - | 1 | 8 | , | 4 | 8 |
| , | 9 |
Subtract the numbers in the tenths column from the top number:
12-4=8
| Place value | tens | ones | . | tenths | hundredths |
| 5 | 12 | ||||
| 2 | 17 | ||||
| 4 | 6 | , | 3 | 7 | |
| - | 1 | 8 | , | 4 | 8 |
| , | 8 | 9 |
Because the upper digit (5) in the ones column is too small to get a positive difference, borrow 1 from the digit (4) in the next number place which becomes (3) and get (15).
| Place value | tens | ones | . | tenths | hundredths |
| 3 | 15 | ||||
| 5 | 12 | ||||
| 2 | 17 | ||||
| 4 | 6 | , | 3 | 7 | |
| - | 1 | 8 | , | 4 | 8 |
| , | 8 | 9 |
Subtract the numbers in the ones column from the top number:
15-8=7
| Place value | tens | ones | . | tenths | hundredths |
| 3 | 15 | ||||
| 5 | 12 | ||||
| 2 | 17 | ||||
| 4 | 6 | , | 3 | 7 | |
| - | 1 | 8 | , | 4 | 8 |
| 7 | , | 8 | 9 |
Subtract the numbers in the tens column from the top number:
3-1=2
| Place value | tens | ones | . | tenths | hundredths |
| 3 | 15 | ||||
| 5 | 12 | ||||
| 2 | 17 | ||||
| 4 | 6 | , | 3 | 7 | |
| - | 1 | 8 | , | 4 | 8 |
| 2 | 7 | , | 8 | 9 |
The solution is: 27,89
Come ci siamo comportati?
Lasciaci un feedbackPerché imparare questo
Why learn this