Soluzione - Long subtraction
30,69
Spiegazione passo passo
1. Rewrite the numbers from top to bottom, aligned by their place values
Place value | tens | ones | . | tenths | hundredths |
3 | 8 | , | 9 | 4 | |
- | 8 | , | 2 | 5 | |
, |
2. Subtract the numbers using long subtraction method
Because the upper digit (4) in the hundredths 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 (14).
Place value | tens | ones | . | tenths | hundredths |
8 | 14 | ||||
3 | 8 | , | 9 | 4 | |
- | 8 | , | 2 | 5 | |
, |
Subtract the numbers in the hundredths column from the top number:
14-5=9
Place value | tens | ones | . | tenths | hundredths |
8 | 14 | ||||
3 | 8 | , | 9 | 4 | |
- | 8 | , | 2 | 5 | |
, | 9 |
Subtract the numbers in the tenths column from the top number:
8-2=6
Place value | tens | ones | . | tenths | hundredths |
8 | 14 | ||||
3 | 8 | , | 9 | 4 | |
- | 8 | , | 2 | 5 | |
, | 6 | 9 |
Subtract the numbers in the ones column from the top number:
8-8=0
Place value | tens | ones | . | tenths | hundredths |
8 | 14 | ||||
3 | 8 | , | 9 | 4 | |
- | 8 | , | 2 | 5 | |
0 | , | 6 | 9 |
Write 3 in the tens place.
Place value | tens | ones | . | tenths | hundredths |
8 | 14 | ||||
3 | 8 | , | 9 | 4 | |
- | 8 | , | 2 | 5 | |
3 | 0 | , | 6 | 9 |
The solution is: 30,69
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