利用天平解决乘法方程

利用天平解决乘法方程
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2020-10-28 11:34
①本范例通过动态天平演示如何通过平衡法解决乘法方程;②涉及核心数学概念包括方程平衡、乘法逆运算、几何直观;③构造要点:运用了Polygon(多边形)、Circle(圆)、Random(随机)、Textfield(文本框)、Frequency(频率)等GeoGebra命令与对象,如ScaleBottom系列对象代表天平托盘,ScaleArm代表杠杆臂;④适合初中及以上数学学习者,用于理解方程解法的直观模型和几何意义。

GeoGebra 命令及参数

  1. Polygon((2.75, 1.95), (2.75, 2.05), (8.25, 2.05), (8.25, 1.95)) → ScaleBottom1, f, g, h, i
  2. Polygon((4.3, 2.35), (4.3, 2.55), (6.7, 2.55), (6.7, 2.35)) → ScaleBottom3, n, p, q, r
  3. Polygon((5, 2.55), (5, 3.25), (6, 3.25), (6, 2.55)) → ScaleBottom4, s, t, d, e
  4. Polygon((2.75, 2.05), (2.75, 2.35), (8.25, 2.35), (8.25, 2.05)) → ScaleBottom2, j, k, l, m
  5. Polygon(Left + (0, 0.2), Left - (0, 0.2), Right - (0, 0.2), Right + (0, 0.2)) → ScaleArm, f_1, g_1, h_1, i_1
  6. Circle(Left, 0.5) → LeftArmCircle1
  7. Circle(Left, 0.3) → LeftArmCircle2
  8. Circle(Right, 0.5) → RightArmCircle1
  9. Circle(Right, 0.3) → RightArmCircle2
  10. Polygon(Left - (0.15, 0), Left + (0.15, 0), Left + (0.15, 0.8), Left + (-0.15, 0.8)) → LeftArmStand, j_1, k_1, l_1, m_1
  11. Polygon(Right - (0.15, 0), Right + (0.15, 0), Right + (0.15, 0.8), Right + (-0.15, 0.8)) → RightArmStand, n_1, p_1, q_1, r_1
  12. Polygon(Left + (-2.25, 0.8), Left + (-2.25, 1), Left + (2.25, 1), Left + (2.25, 0.8)) → LeftTray, s_1, t_1, a_1, b_1
  13. Polygon(Right + (-2.25, 0.8), Right + (-2.25, 1), Right + (2.25, 1), Right + (2.25, 0.8)) → RightTray, c_1, d_1, e_1, f_2
  14. Circle((5.5, 3.4), 0.6) → ScaleBottom5
  15. Circle((5.5, 3.4), 0.4) → ScaleBottom6
  16. Random(1, 2) → sideorder
  17. Polygon((-3.8, 4.6), (-1, 4.6), (-1, 3.2), (-3.8, 3.2)) → ImageBox, c, g_2, h_2, i_2
  18. Textfield(usertext) → InputBox1
  19. Frequency(Sort[Insert[{0, 1, 2}, WeightLocator, -1]]) → WeightOccurences
  20. Frequency(Sort[Insert[{0, 1, 2}, BagLocator, -1]]) → BagOccurences

AI 绘图提示语参考

绘制一个天平平衡模型,用于演示乘法方程的求解。底部有多个矩形底座,上方是水平横梁,两端各有一个圆形支点和竖直立柱,立柱顶端连接托盘。托盘上放置随机数量的砝码和未知数袋子,通过输入框调整数值,使天平保持平衡。整体为几何图形风格,包含矩形、圆形和文本输入区域,背景简洁,适合教学演示。
以上提示语为根据原始绘图命令整理而来,仅供参考。