Soluzione - Long subtraction
15,85
Spiegazione passo passo
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | tens | ones | . | tenths | hundredths |
| 7 | 0 | , | 6 | 5 | |
| - | 5 | 4 | , | 8 | |
| , |
Put zeros in the blank number places:
| Place value | tens | ones | . | tenths | hundredths |
| 7 | 0 | , | 6 | 5 | |
| - | 5 | 4 | , | 8 | 0 |
| , |
2. Subtract the numbers using long subtraction method
Subtract the numbers in the hundredths column from the top number:
5-0=5
| Place value | tens | ones | . | tenths | hundredths |
| 7 | 0 | , | 6 | 5 | |
| - | 5 | 4 | , | 8 | 0 |
| , | 5 |
Because the upper digit (6) in the tenths column is too small to get a positive difference, borrow 1 from the number to the left (70) which becomes (69) and get (16).
| Place value | tens | ones | . | tenths | hundredths |
| 6 | 16 | ||||
| 7 | 0 | , | 6 | 5 | |
| - | 5 | 4 | , | 8 | 0 |
| , | 5 |
Subtract the numbers in the tenths column from the top number:
16-8=8
| Place value | tens | ones | . | tenths | hundredths |
| 6 | 16 | ||||
| 7 | 0 | , | 6 | 5 | |
| - | 5 | 4 | , | 8 | 0 |
| , | 8 | 5 |
Subtract the numbers in the ones column from the top number:
9-4=5
| Place value | tens | ones | . | tenths | hundredths |
| 6 | 16 | ||||
| 7 | 0 | , | 6 | 5 | |
| - | 5 | 4 | , | 8 | 0 |
| 5 | , | 8 | 5 |
Subtract the numbers in the tens column from the top number:
6-5=1
| Place value | tens | ones | . | tenths | hundredths |
| 6 | 16 | ||||
| 7 | 0 | , | 6 | 5 | |
| - | 5 | 4 | , | 8 | 0 |
| 1 | 5 | , | 8 | 5 |
The solution is: 15,85
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