Soluzione - Long subtraction
46,16
Spiegazione passo passo
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | tens | ones | . | tenths | hundredths |
| 8 | 5 | , | 7 | 1 | |
| - | 3 | 9 | , | 5 | 5 |
| , |
2. Subtract the numbers using long subtraction method
Because the upper digit (1) in the hundredths column is too small to get a positive difference, borrow 1 from the digit (7) in the next number place which becomes (6) and get (11).
| Place value | tens | ones | . | tenths | hundredths |
| 6 | 11 | ||||
| 8 | 5 | , | 7 | 1 | |
| - | 3 | 9 | , | 5 | 5 |
| , |
Subtract the numbers in the hundredths column from the top number:
11-5=6
| Place value | tens | ones | . | tenths | hundredths |
| 6 | 11 | ||||
| 8 | 5 | , | 7 | 1 | |
| - | 3 | 9 | , | 5 | 5 |
| , | 6 |
Subtract the numbers in the tenths column from the top number:
6-5=1
| Place value | tens | ones | . | tenths | hundredths |
| 6 | 11 | ||||
| 8 | 5 | , | 7 | 1 | |
| - | 3 | 9 | , | 5 | 5 |
| , | 1 | 6 |
Because the upper digit (5) in the ones 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 (15).
| Place value | tens | ones | . | tenths | hundredths |
| 7 | 15 | ||||
| 6 | 11 | ||||
| 8 | 5 | , | 7 | 1 | |
| - | 3 | 9 | , | 5 | 5 |
| , | 1 | 6 |
Subtract the numbers in the ones column from the top number:
15-9=6
| Place value | tens | ones | . | tenths | hundredths |
| 7 | 15 | ||||
| 6 | 11 | ||||
| 8 | 5 | , | 7 | 1 | |
| - | 3 | 9 | , | 5 | 5 |
| 6 | , | 1 | 6 |
Subtract the numbers in the tens column from the top number:
7-3=4
| Place value | tens | ones | . | tenths | hundredths |
| 7 | 15 | ||||
| 6 | 11 | ||||
| 8 | 5 | , | 7 | 1 | |
| - | 3 | 9 | , | 5 | 5 |
| 4 | 6 | , | 1 | 6 |
The solution is: 46,16
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