Soluzione - Long subtraction
15,8
Spiegazione passo passo
1. Rewrite the numbers from top to bottom, aligned by their place values
Place value | tens | ones | . | tenths | hundredths |
1 | 7 | , | 2 | 5 | |
- | 1 | , | 4 | 5 | |
, |
2. Subtract the numbers using long subtraction method
Subtract the numbers in the hundredths column from the top number:
5-5=0
Place value | tens | ones | . | tenths | hundredths |
1 | 7 | , | 2 | 5 | |
- | 1 | , | 4 | 5 | |
, | 0 |
Because the upper digit (2) in the tenths 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 (12).
Place value | tens | ones | . | tenths | hundredths |
6 | 12 | ||||
1 | 7 | , | 2 | 5 | |
- | 1 | , | 4 | 5 | |
, | 0 |
Subtract the numbers in the tenths column from the top number:
12-4=8
Place value | tens | ones | . | tenths | hundredths |
6 | 12 | ||||
1 | 7 | , | 2 | 5 | |
- | 1 | , | 4 | 5 | |
, | 8 | 0 |
Subtract the numbers in the ones column from the top number:
6-1=5
Place value | tens | ones | . | tenths | hundredths |
6 | 12 | ||||
1 | 7 | , | 2 | 5 | |
- | 1 | , | 4 | 5 | |
5 | , | 8 | 0 |
Write 1 in the tens place.
Place value | tens | ones | . | tenths | hundredths |
6 | 12 | ||||
1 | 7 | , | 2 | 5 | |
- | 1 | , | 4 | 5 | |
1 | 5 | , | 8 | 0 |
The solution is: 15,8
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