用面积模型表示两位数×两位数乘法（GeoGebra 互动示例）

GeoGebra 命令及参数

1. Intersect(xAxis, yAxis) → A
2. Point(yAxis) → D
3. Point(xAxis) → E
4. Point(xAxis) → F
5. Point(yAxis) → L
6. Polygon(A, E, G, L) → q1, a_{2}, e, g_{4}, l_{2}
7. Polygon(E, F, H, G) → q2, e_1, f_{2}, h_{4}, g_1
8. Polygon(G, H, K, J) → q5, g_2, h_3, k_1, j_{2}
9. Polygon(L, G, J, D) → q6, l_1, g_3, j_1, d_{2}
10. Segment(D, A) → q
11. Segment(J, E) → s
12. Segment(K, F) → t
13. Random(1, 9) → o
14. Random(1, 9) → u
15. Random(1, 9) → v
16. Random(1, 9) → w
17. Random(1, 9) → a_1
18. Random(1, 9) → b_1
19. Textfield(d_1) → a
20. Textfield(m_1) → b
21. Textfield(t_1) → d
22. Textfield(u_1) → f
23. Textfield(o_1) → g
24. Textfield(p_1) → h
25. Textfield(r_1) → k
26. Textfield(s_1) → l
27. Textfield(ansguess) → n
28. If(n_1 ≟ v, "√", "X") → text3
29. If(t_1 ≟ (10 * w), "√", "X") → text4
30. If(u_1 ≟ a_1, "√", "X") → text5
31. If(ansguess ≟ produc, "☺", "☹ ") → text7
32. Segment(L, H) → r
33. Segment(A, F) → m_{2}
34. Segment(D, K) → p
35. If(d_1 ≟ (10 * u), "√", "X") → text1
36. If(m_1 ≟ v, "√", "X") → text2