Soluzione - Long subtraction
8,3
Spiegazione passo passo
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | tens | ones | . | tenths |
| 1 | 3 | , | 6 | |
| 1 | , | 4 | ||
| - | 3 | , | 9 | |
| , |
2. Subtract the numbers using long subtraction method
Because the upper digit (6) 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 (16).
| Place value | tens | ones | . | tenths |
| 2 | 16 | |||
| 1 | 3 | , | 6 | |
| 1 | , | 4 | ||
| - | 3 | , | 9 | |
| , |
Subtract the numbers in the tenths column from the top number:
16-4-9=3
| Place value | tens | ones | . | tenths |
| 2 | 16 | |||
| 1 | 3 | , | 6 | |
| 1 | , | 4 | ||
| - | 3 | , | 9 | |
| , | 3 |
Because the upper digit (2) in the ones column is too small to get a positive difference, borrow 1 from the digit (1) in the next number place which becomes (0) and get (12).
| Place value | tens | ones | . | tenths |
| 0 | 12 | |||
| 2 | 16 | |||
| 1 | 3 | , | 6 | |
| 1 | , | 4 | ||
| - | 3 | , | 9 | |
| , | 3 |
Subtract the numbers in the ones column from the top number:
12-1-3=8
| Place value | tens | ones | . | tenths |
| 0 | 12 | |||
| 2 | 16 | |||
| 1 | 3 | , | 6 | |
| 1 | , | 4 | ||
| - | 3 | , | 9 | |
| 8 | , | 3 |
Write 0 in the tens place.
| Place value | tens | ones | . | tenths |
| 0 | 12 | |||
| 2 | 16 | |||
| 1 | 3 | , | 6 | |
| 1 | , | 4 | ||
| - | 3 | , | 9 | |
| 0 | 8 | , | 3 |
The solution is: 8,3
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