Soluzione - Long subtraction
11,86
Spiegazione passo passo
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | tens | ones | . | tenths | hundredths |
| 7 | 9 | , | 6 | 6 | |
| - | 6 | 7 | , | 8 | |
| , |
Put zeros in the blank number places:
| Place value | tens | ones | . | tenths | hundredths |
| 7 | 9 | , | 6 | 6 | |
| - | 6 | 7 | , | 8 | 0 |
| , |
2. Subtract the numbers using long subtraction method
Subtract the numbers in the hundredths column from the top number:
6-0=6
| Place value | tens | ones | . | tenths | hundredths |
| 7 | 9 | , | 6 | 6 | |
| - | 6 | 7 | , | 8 | 0 |
| , | 6 |
Because the upper digit (6) in the tenths column is too small to get a positive difference, borrow 1 from the digit (9) in the next number place which becomes (8) and get (16).
| Place value | tens | ones | . | tenths | hundredths |
| 8 | 16 | ||||
| 7 | 9 | , | 6 | 6 | |
| - | 6 | 7 | , | 8 | 0 |
| , | 6 |
Subtract the numbers in the tenths column from the top number:
16-8=8
| Place value | tens | ones | . | tenths | hundredths |
| 8 | 16 | ||||
| 7 | 9 | , | 6 | 6 | |
| - | 6 | 7 | , | 8 | 0 |
| , | 8 | 6 |
Subtract the numbers in the ones column from the top number:
8-7=1
| Place value | tens | ones | . | tenths | hundredths |
| 8 | 16 | ||||
| 7 | 9 | , | 6 | 6 | |
| - | 6 | 7 | , | 8 | 0 |
| 1 | , | 8 | 6 |
Subtract the numbers in the tens column from the top number:
7-6=1
| Place value | tens | ones | . | tenths | hundredths |
| 8 | 16 | ||||
| 7 | 9 | , | 6 | 6 | |
| - | 6 | 7 | , | 8 | 0 |
| 1 | 1 | , | 8 | 6 |
The solution is: 11,86
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