Soluzione - Long subtraction
Spiegazione passo passo
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | hundreds | tens | ones | . | tenths | hundredths | thousandths |
| 8 | 0 | 3 | , | 3 | 0 | 9 | |
| - | 1 | 3 | 3 | , | 3 | 6 | |
| , |
Put zeros in the blank number places:
| Place value | hundreds | tens | ones | . | tenths | hundredths | thousandths |
| 8 | 0 | 3 | , | 3 | 0 | 9 | |
| - | 1 | 3 | 3 | , | 3 | 6 | 0 |
| , |
2. Subtract the numbers using long subtraction method
Subtract the numbers in the thousandths column from the top number:
9-0=9
| Place value | hundreds | tens | ones | . | tenths | hundredths | thousandths |
| 8 | 0 | 3 | , | 3 | 0 | 9 | |
| - | 1 | 3 | 3 | , | 3 | 6 | 0 |
| , | 9 |
Because the upper digit (0) in the hundredths 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 (10).
| Place value | hundreds | tens | ones | . | tenths | hundredths | thousandths |
| 2 | 10 | ||||||
| 8 | 0 | 3 | , | 3 | 0 | 9 | |
| - | 1 | 3 | 3 | , | 3 | 6 | 0 |
| , | 9 |
Subtract the numbers in the hundredths column from the top number:
10-6=4
| Place value | hundreds | tens | ones | . | tenths | hundredths | thousandths |
| 2 | 10 | ||||||
| 8 | 0 | 3 | , | 3 | 0 | 9 | |
| - | 1 | 3 | 3 | , | 3 | 6 | 0 |
| , | 4 | 9 |
Because the upper digit (2) in the tenths 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 (12).
| Place value | hundreds | tens | ones | . | tenths | hundredths | thousandths |
| 2 | 12 | ||||||
| 2 | 10 | ||||||
| 8 | 0 | 3 | , | 3 | 0 | 9 | |
| - | 1 | 3 | 3 | , | 3 | 6 | 0 |
| , | 4 | 9 |
Subtract the numbers in the tenths column from the top number:
12-3=9
| Place value | hundreds | tens | ones | . | tenths | hundredths | thousandths |
| 2 | 12 | ||||||
| 2 | 10 | ||||||
| 8 | 0 | 3 | , | 3 | 0 | 9 | |
| - | 1 | 3 | 3 | , | 3 | 6 | 0 |
| , | 9 | 4 | 9 |
Because the upper digit (2) in the ones column is too small to get a positive difference, borrow 1 from the number to the left (80) which becomes (79) and get (12).
| Place value | hundreds | tens | ones | . | tenths | hundredths | thousandths |
| 7 | 9 | 12 | |||||
| 2 | 12 | ||||||
| 2 | 10 | ||||||
| 8 | 0 | 3 | , | 3 | 0 | 9 | |
| - | 1 | 3 | 3 | , | 3 | 6 | 0 |
| , | 9 | 4 | 9 |
Subtract the numbers in the ones column from the top number:
12-3=9
| Place value | hundreds | tens | ones | . | tenths | hundredths | thousandths |
| 7 | 9 | 12 | |||||
| 2 | 12 | ||||||
| 2 | 10 | ||||||
| 8 | 0 | 3 | , | 3 | 0 | 9 | |
| - | 1 | 3 | 3 | , | 3 | 6 | 0 |
| 9 | , | 9 | 4 | 9 |
Subtract the numbers in the tens column from the top number:
9-3=6
| Place value | hundreds | tens | ones | . | tenths | hundredths | thousandths |
| 7 | 9 | 12 | |||||
| 2 | 12 | ||||||
| 2 | 10 | ||||||
| 8 | 0 | 3 | , | 3 | 0 | 9 | |
| - | 1 | 3 | 3 | , | 3 | 6 | 0 |
| 6 | 9 | , | 9 | 4 | 9 |
Subtract the numbers in the hundreds column from the top number:
7-1=6
| Place value | hundreds | tens | ones | . | tenths | hundredths | thousandths |
| 7 | 9 | 12 | |||||
| 2 | 12 | ||||||
| 2 | 10 | ||||||
| 8 | 0 | 3 | , | 3 | 0 | 9 | |
| - | 1 | 3 | 3 | , | 3 | 6 | 0 |
| 6 | 6 | 9 | , | 9 | 4 | 9 |
The solution is: 669,949
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