Soluzione - Long subtraction
80
Spiegazione passo passo
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| 3 | 7 | 5 | , | 2 | 5 | |
| - | 2 | 9 | 5 | , | 2 | 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 | hundreds | tens | ones | . | tenths | hundredths |
| 3 | 7 | 5 | , | 2 | 5 | |
| - | 2 | 9 | 5 | , | 2 | 5 |
| , | 0 |
Subtract the numbers in the tenths column from the top number:
2-2=0
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| 3 | 7 | 5 | , | 2 | 5 | |
| - | 2 | 9 | 5 | , | 2 | 5 |
| , | 0 | 0 |
Subtract the numbers in the ones column from the top number:
5-5=0
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| 3 | 7 | 5 | , | 2 | 5 | |
| - | 2 | 9 | 5 | , | 2 | 5 |
| 0 | , | 0 | 0 |
Because the upper digit (7) in the tens column is too small to get a positive difference, borrow 1 from the digit (3) in the next number place which becomes (2) and get (17).
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| 2 | 17 | |||||
| 3 | 7 | 5 | , | 2 | 5 | |
| - | 2 | 9 | 5 | , | 2 | 5 |
| 0 | , | 0 | 0 |
Subtract the numbers in the tens column from the top number:
17-9=8
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| 2 | 17 | |||||
| 3 | 7 | 5 | , | 2 | 5 | |
| - | 2 | 9 | 5 | , | 2 | 5 |
| 8 | 0 | , | 0 | 0 |
Subtract the numbers in the hundreds column from the top number:
2-2=0
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| 2 | 17 | |||||
| 3 | 7 | 5 | , | 2 | 5 | |
| - | 2 | 9 | 5 | , | 2 | 5 |
| 0 | 8 | 0 | , | 0 | 0 |
The solution is: 80
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