Soluzione - Long subtraction
329,42
Spiegazione passo passo
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| 3 | 3 | 6 | , | 5 | 2 | |
| - | 7 | , | 1 | |||
| , |
Put zeros in the blank number places:
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| 3 | 3 | 6 | , | 5 | 2 | |
| - | 7 | , | 1 | 0 | ||
| , |
2. Subtract the numbers using long subtraction method
Subtract the numbers in the hundredths column from the top number:
2-0=2
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| 3 | 3 | 6 | , | 5 | 2 | |
| - | 7 | , | 1 | 0 | ||
| , | 2 |
Subtract the numbers in the tenths column from the top number:
5-1=4
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| 3 | 3 | 6 | , | 5 | 2 | |
| - | 7 | , | 1 | 0 | ||
| , | 4 | 2 |
Because the upper digit (6) in the ones 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 (16).
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| 2 | 16 | |||||
| 3 | 3 | 6 | , | 5 | 2 | |
| - | 7 | , | 1 | 0 | ||
| , | 4 | 2 |
Subtract the numbers in the ones column from the top number:
16-7=9
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| 2 | 16 | |||||
| 3 | 3 | 6 | , | 5 | 2 | |
| - | 7 | , | 1 | 0 | ||
| 9 | , | 4 | 2 |
Write 2 in the tens place.
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| 2 | 16 | |||||
| 3 | 3 | 6 | , | 5 | 2 | |
| - | 7 | , | 1 | 0 | ||
| 2 | 9 | , | 4 | 2 |
Write 3 in the hundreds place.
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| 2 | 16 | |||||
| 3 | 3 | 6 | , | 5 | 2 | |
| - | 7 | , | 1 | 0 | ||
| 3 | 2 | 9 | , | 4 | 2 |
The solution is: 329,42
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