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Историческую версию Multiplying Fractions можно получить на Android
Обучение, как умножить фракций.
This app allow you to visualize the multiplication of two fractions that are less than one. You can read the presentation image as THE HALF OF A HALF IS A QUARTER,
MULTIPLY, in the menu bar, allow you to try addition exercises. Fractions are randomly generated by the app.
Use the signs + and - to change numerator and denominator values. When there are two lines of signs, the first one is for numerator and the second one for denominator.
NEXT allow you to get a new problem.