分数加法可视化：用条形图与动态过程演示异分母分数相加

GeoGebra 命令及参数

1. Point({(a1 * moveTimer), (-2 * moveTimer)}) → a2mover
2. Point({0, 2 - (4 * moveTimer)}) → a1mover
3. Textfield(a1text) → InputBox1
4. Polygon(a1mover, a1mover + (a1, 0), a1mover + (a1, 1), a1mover + (0, 1)) → a1poly, f, g, h, i
5. Polygon(a2mover, a2mover + (a2, 0), a2mover + (a2, 1), a2mover + (0, 1)) → a2poly, j, k, l, m
6. Textfield(a2text) → InputBox2
7. Polygon((0, 2), (a1, 2), (a1, 3), (0, 3)) → a1polyFixed, m_1, n_1, p_1, q_1
8. Polygon((0, 0), (a2, 0), (a2, 1), (0, 1)) → a2polyFixed, r_1, s_1, t_1, f_2
9. Point({0, 2 - (4 * barMoveTime)}) → a1barMover
10. Point({0, (-2 * barMoveTime)}) → a2barMover
11. Sequence(Segment[(i, 0), (i, 1)], i, 1 / a2denom, ceil(a2) - 1 / a2denom, 1 / a2denom) → list5
12. Sequence(Segment[(i, 2), (i, 3)], i, 1 / a1denom, ceil(a1) - 1 / a1denom, 1 / a1denom) → list4
13. LCM(a1denom, a2denom) → a
14. Sequence(Segment[(0, -2) + (i, 0), (0, -2) + (i, growBarTimer)], i, 1 / a, ceil(a1 + a2) - 1 / a, 1 / a) → list7
15. Sequence(Polygon[(i, -2), (i + 1, -2), 4], i, 0, ceil(a1 + a2) - 1) → list3
16. Sequence(Polygon[(i, 0), (i + 1, 0), 4], i, 0, ceil(a2) - 1) → list1
17. Sequence(Polygon[(i, 2), (i + 1, 2), 4], i, 0, ceil(a1) - 1) → list2
18. RemoveUndefined(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