3位数×3位数面积模型：用区域分块可视化乘法

GeoGebra 命令及参数

1. Intersect(xAxis, yAxis) → A
2. Random(1, 9) → w
3. Random(0, 9) → v
4. Random(1, 9) → u
5. Random(1, 9) → a_1
6. Random(0, 9) → w_1
7. Random(0, 9) → b_2
8. Point(yAxis) → D
9. Point(xAxis) → E
10. Point(xAxis) → F
11. Point(yAxis) → L
12. Polygon(A, E, G, L) → q1, a_{2}, e, g_{4}, l_{2}
13. Polygon(E, F, H, G) → q2, e_1, f_{2}, h_{4}, g_1
14. Polygon(G, H, K, J) → q5, g_2, h_3, k_1, j_{2}
15. Polygon(L, G, J, D) → q6, l_1, g_3, j_1, d_{2}
16. Segment(D, A) → q_{3}
17. Segment(J, E) → s
18. Segment(K, F) → t
19. Random(1, 9) → o_{3}
20. Random(1, 9) → b_1
21. Textfield(d_1) → a
22. Textfield(m_1) → b
23. Textfield(t_1) → f
24. Textfield(u_1) → g
25. Textfield(o_1) → l
26. Textfield(p_1) → m
27. Textfield(r_1) → o
28. Textfield(s_1) → p
29. Textfield(ansguess) → r
30. If(n_1 ≟ v, "√", "X") → text3
31. If(ansguess ≟ produc, "☺", "☹ ") → text7
32. Segment(L, H) → r_{3}
33. Segment(A, F) → m_{2}
34. Segment(D, K) → p_{3}
35. Vector(L, D) → c_{3}
36. Translate(D, c_{3}) → D'
37. Translate(J, c_{3}) → J'
38. Translate(K, c_{3}) → K'
39. Vector(D, J) → i
40. Translate(H, i) → H'
41. Translate(K, i) → K'_{1}
42. Translate(F, i) → F'
43. Translate(K', i) → K''
44. Segment(D', K'') → j_{5}
45. Segment(K'', F') → m_{3}
46. Segment(F', F) → f_1
47. Segment(H, H') → h_1
48. Segment(K, K'_{1}) → i_1
49. Segment(K', K) → h_2
50. Segment(J', J) → i_2
51. Segment(D', D) → k_2
52. Textfield(c_2) → h
53. Textfield(e_2) → j
54. Textfield(n_2) → k
55. Textfield(o_2) → n
56. Textfield(p_2) → q
57. Textfield(q_2) → d
58. Textfield(r_2) → c
59. If(sidetrue, "√", "X") → text5
60. If(toptrue, "√", "X") → text2
61. Polygon(D, J, J', D') → q3, d_3, j_3, j', d'
62. Polygon(J, K, K', J') → q4, j_4, k_3, k', s_2
63. Polygon(K, K'_{1}, K'', K') → q7, k_4, k'_{1}, k'', t_2
64. Polygon(H, H', K'_{1}, K) → q8, h_5, h', f_3, k_5
65. Polygon(F, F', H', H) → q9, f_4, f', i_3, h_6