分数加法可视化 by jgoldapp
几何画板及绘图内容加载中,请稍等……
①本范例通过动态图形演示分数加法的几何意义,直观展示分数合并的过程;②涉及核心数学概念包括分数、最小公倍数(LCM)、几何表示;③构造要点运用了Point, Textfield, Polygon, Sequence, LCM, RemoveUndefined等GeoGebra命令与对象,如用Polygon绘制分数条,用Sequence生成动态序列;④适合初中及以上数学教学,用于分数加法概念的理解与可视化教学。
GeoGebra 命令及参数
Point({(a1 * moveTimer), (-2 * moveTimer)}) → a2moverPoint({0, 2 - (4 * moveTimer)}) → a1moverTextfield(a1text) → InputBox1Polygon(a1mover, a1mover + (a1, 0), a1mover + (a1, 1), a1mover + (0, 1)) → a1poly, f, g, h, iPolygon(a2mover, a2mover + (a2, 0), a2mover + (a2, 1), a2mover + (0, 1)) → a2poly, j, k, l, mTextfield(a2text) → InputBox2Polygon((0, 2), (a1, 2), (a1, 3), (0, 3)) → a1polyFixed, m_1, n_1, p_1, q_1Polygon((0, 0), (a2, 0), (a2, 1), (0, 1)) → a2polyFixed, r_1, s_1, t_1, f_2Point({0, 2 - (4 * barMoveTime)}) → a1barMoverPoint({0, (-2 * barMoveTime)}) → a2barMoverSequence(Segment[(i, 0), (i, 1)], i, 1 / a2denom, ceil(a2) - 1 / a2denom, 1 / a2denom) → list5Sequence(Segment[(i, 2), (i, 3)], i, 1 / a1denom, ceil(a1) - 1 / a1denom, 1 / a1denom) → list4LCM(a1denom, a2denom) → aSequence(Segment[(0, -2) + (i, 0), (0, -2) + (i, growBarTimer)], i, 1 / a, ceil(a1 + a2) - 1 / a, 1 / a) → list7Sequence(Polygon[(i, -2), (i + 1, -2), 4], i, 0, ceil(a1 + a2) - 1) → list3Sequence(Polygon[(i, 0), (i + 1, 0), 4], i, 0, ceil(a2) - 1) → list1Sequence(Polygon[(i, 2), (i + 1, 2), 4], i, 0, ceil(a1) - 1) → list2RemoveUndefined(Join[{Sequence[Segment[a1barMover + (i, 0), a1barMover + (i, 1)], i, 1 / a1denom, ceil(a1) - 1 / a1denom, 1 / a1denom], Sequence[Segment[a2barMover + (i, 0), a2barMover + (i, 1)], i, 1 / a2denom, ceil(a2) - 1 / a2denom, 1 / a2denom]}]) → list6
AI 绘图提示语参考
画两条分数条,分别代表两个分数,用不同颜色区分,并显示对应的数值。在下方绘制一个长条,通过动态分割显示两个分数相加的结果,直观展示分数加法的几何意义。分数条和结果长条都应使用矩形表示,并标注每个部分对应的数值。
以上提示语为根据原始绘图命令整理而来,仅供参考。