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Fractions calculation：
Enter the fractions calculation formula directly and click the "Next" button to get the calculation answer.
It does not support mathematical functions (including trigonometric functions) and can only calculate the addition, subtraction, multiplication and division of two fractions. The fraction line is indicated by "/".
Enter the fractions calculation formula directly and click the "Next" button to get the calculation answer.
It does not support mathematical functions (including trigonometric functions) and can only calculate the addition, subtraction, multiplication and division of two fractions. The fraction line is indicated by "/".
Current location：Mathematical operation > History of fraction calculation > Answer
Overview: 1 questions will be solved this time.Among them
☆1 fraction calculations
[ 1/1 Fraction calculation ]
Question type: Fractional subtraction
Original question: 1/9-1/7
Solution:
1 9 | － | 1 7 |
Divide the least common multiple 63 by the denominator 9 of the minuend to get 7
Multiply the numerator 1 and denominator 9 of the subtracted number by 7
Then divide the least common multiple 63 by the denominator 7 of the subtraction to get 9
Multiply the subtracted numerator 1 and denominator 7 by 9 at the same time
| = | 7 63 | － | 9 63 |
| = | - | 2 63 |