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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: 1/5-7/18
Solution:
1 5 | － | 7 18 |
Divide the least common multiple 90 by the denominator 5 of the minuend to get 18
Multiply the numerator 1 and denominator 5 of the subtracted number by 18
Then divide the least common multiple 90 by the denominator 18 of the subtraction to get 5
Multiply the subtracted numerator 7 and denominator 18 by 5 at the same time
| = | 18 90 | － | 35 90 |
| = | - | 17 90 |