两个数相加（小于20）

GeoGebra 命令及参数

1. Shuffle(listpoints) → lp, {(11, 12), (8, 12), (2, 12), (5, 12)}
2. Random(4, 10) → aA
3. Random(5, 12) → bB
4. Random(12, 20) → dD
5. Random(8, 15) → cC
6. Random(1, aA - 1) → a1
7. Random(3, bB - 1) → b1
8. Random(5, cC - 1) → c1
9. Random(5, dD - 1) → d1
10. Textfield(goal) → InputBox1
11. If(level ≟ 1, aA, If[level ≟ 2, bB, If[level ≟ 3, cC, dD]]) → qQ
12. Remove(Sequence[1, aA - 1], {a1, a2}) → lista
13. RandomElement(lista) → a3
14. Remove(Sequence[1, bB - 1], {b1, b2}) → listb
15. Remove(Sequence[1, cC - 1], {c1, c2}) → listc3
16. RandomElement(listc3) → c3
17. Remove(Sequence[1, cC - 1], {c1, c2, c3}) → listc4
18. RandomElement(listb) → b3
19. Remove(Sequence[1, dD - 1], {d1, d2}) → listd3
20. RandomElement(listd3) → d3
21. Remove(Sequence[1, dD - 1], {d1, d2, d3}) → listd4
22. Element(lp, 1) → A
23. Element(lp, 2) → C
24. Element(lp, 3) → E
25. Element(lp, 4) → G
26. If(level ≟ 1, a1, If[level ≟ 2, b1, If[level ≟ 3, c1, d1]]) → n1
27. If(level ≟ 1, a2, If[level ≟ 2, b2, If[level ≟ 3, c2, d2]]) → n2
28. If(level ≟ 1, a3, If[level ≟ 2, b3, If[level ≟ 3, c3, d3]]) → n3
29. RandomElement(listc4) → c4
30. RandomElement(listd4) → d4
31. If(level ≟ 1, 0, If[level ≟ 2, 0, If[level ≟ 3, c4, d4]]) → n4
32. Circle(A, 1) → c
33. Circle(C, 1) → d
34. Circle(E, 1) → e
35. Circle(G, 1) → f
36. Polygon(B, D, 4) → poly1, g, h, i, j, F, H
37. Midpoint(B, F) → I