同分母分数比较

几何画板及绘图内容加载中，请稍等……

2016-06-08 22:50

①本范例演示如何比较具有相同分母的分数；②涉及核心数学概念包括分数比较、最小公倍数、几何直观；③构造要点使用了Random, LaTeX, GCD, Circle, button, CreateFraction, Numer, Denom, Whole, FracValue, FracDisplay, CreateDragArea, Point, DragRadius, DragArea, EqualSign, GreaterSign, LessSign, CreateCircleSpace, CirclePoint, CircRadius, CircleOutline等GeoGebra命令和对象；④适合小学高年级或初中生学习分数比较和几何应用。

GeoGebra 命令及参数

Random(2, 25) → SameDenom
LaTeX(Text["\dfrac{" + Numer1 + "}{" + Denom1 + "}"]) → FracDisplay1
LaTeX(Text["\dfrac{" + Numer2 + "}{" + Denom2 + "}"]) → FracDisplay2
GCD(Numer1, Denom1) → GCD1
GCD(Numer2, Denom2) → GCD2
Circle(Point1, DragRadius1) → DragArea1
Circle(Point2, DragRadius2) → DragArea2
Circle(Point3, DragRadius3) → DragArea3
Circle(CirclePoint1, CircRadius1) → CircleOutline1