Soluzione - Long subtraction
621,17
Spiegazione passo passo
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| 6 | 2 | 1 | , | 4 | ||
| - | 0 | , | 2 | 3 | ||
| , |
Put zeros in the blank number places:
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| 6 | 2 | 1 | , | 4 | 0 | |
| - | 0 | , | 2 | 3 | ||
| , |
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 (4) in the next number place which becomes (3) and get (10).
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| 3 | 10 | |||||
| 6 | 2 | 1 | , | 4 | 0 | |
| - | 0 | , | 2 | 3 | ||
| , |
Subtract the numbers in the hundredths column from the top number:
10-0-3=7
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| 3 | 10 | |||||
| 6 | 2 | 1 | , | 4 | 0 | |
| - | 0 | , | 2 | 3 | ||
| , | 7 |
Subtract the numbers in the tenths column from the top number:
3-2=1
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| 3 | 10 | |||||
| 6 | 2 | 1 | , | 4 | 0 | |
| - | 0 | , | 2 | 3 | ||
| , | 1 | 7 |
Subtract the numbers in the ones column from the top number:
1-0=1
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| 3 | 10 | |||||
| 6 | 2 | 1 | , | 4 | 0 | |
| - | 0 | , | 2 | 3 | ||
| 1 | , | 1 | 7 |
Write 2 in the tens place.
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| 3 | 10 | |||||
| 6 | 2 | 1 | , | 4 | 0 | |
| - | 0 | , | 2 | 3 | ||
| 2 | 1 | , | 1 | 7 |
Write 6 in the hundreds place.
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| 3 | 10 | |||||
| 6 | 2 | 1 | , | 4 | 0 | |
| - | 0 | , | 2 | 3 | ||
| 6 | 2 | 1 | , | 1 | 7 |
The solution is: 621,17
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