Soluzione - Long subtraction
9,18
Spiegazione passo passo
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | tens | ones | . | tenths | hundredths |
| 1 | 0 | , | 8 | ||
| - | 1 | , | 6 | 2 | |
| , |
Put zeros in the blank number places:
| Place value | tens | ones | . | tenths | hundredths |
| 1 | 0 | , | 8 | 0 | |
| - | 1 | , | 6 | 2 | |
| , |
2. Subtract the numbers using long subtraction method
Because the upper digit (0) in the hundredths 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 (10).
| Place value | tens | ones | . | tenths | hundredths |
| 7 | 10 | ||||
| 1 | 0 | , | 8 | 0 | |
| - | 1 | , | 6 | 2 | |
| , |
Subtract the numbers in the hundredths column from the top number:
10-0-2=8
| Place value | tens | ones | . | tenths | hundredths |
| 7 | 10 | ||||
| 1 | 0 | , | 8 | 0 | |
| - | 1 | , | 6 | 2 | |
| , | 8 |
Subtract the numbers in the tenths column from the top number:
7-6=1
| Place value | tens | ones | . | tenths | hundredths |
| 7 | 10 | ||||
| 1 | 0 | , | 8 | 0 | |
| - | 1 | , | 6 | 2 | |
| , | 1 | 8 |
Because the upper digit (0) in the ones column is too small to get a positive difference, borrow 1 from the digit (1) in the next number place which becomes (0) and get (10).
| Place value | tens | ones | . | tenths | hundredths |
| 0 | 10 | ||||
| 7 | 10 | ||||
| 1 | 0 | , | 8 | 0 | |
| - | 1 | , | 6 | 2 | |
| , | 1 | 8 |
Subtract the numbers in the ones column from the top number:
10-1=9
| Place value | tens | ones | . | tenths | hundredths |
| 0 | 10 | ||||
| 7 | 10 | ||||
| 1 | 0 | , | 8 | 0 | |
| - | 1 | , | 6 | 2 | |
| 9 | , | 1 | 8 |
Write 0 in the tens place.
| Place value | tens | ones | . | tenths | hundredths |
| 0 | 10 | ||||
| 7 | 10 | ||||
| 1 | 0 | , | 8 | 0 | |
| - | 1 | , | 6 | 2 | |
| 0 | 9 | , | 1 | 8 |
The solution is: 9,18
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