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Rekenrek

Rekenrek
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2014-04-22 05:21
SequenceCoordinate GeometrySlider Animation
This GeoGebra applet is used to build number sense with small numbers. It involves addition of natural numbers. Using commands like Polygon, Point, Segment, Circle, etc., the Rekenrek model is constructed. Suitable for elementary school students to learn number sense and addition.

GeoGebra Commands & Parameters

  1. Polygon(A, B, C, D) → poly1, a, b, c, d
  2. Point(a) → E
  3. Point(c) → F
  4. Segment(E, F) → e
  5. Point(a) → G
  6. Point(c) → H
  7. Segment(G, H) → f
  8. Point(a) → I
  9. Point(c) → J
  10. Segment(I, J) → g
  11. Point(e) → K
  12. Point(e) → L
  13. Point(e) → M
  14. Point(e) → N
  15. Point(e) → O
  16. Point(e) → P
  17. Point(e) → Q
  18. Point(e) → R
  19. Point(e) → S
  20. Point(e) → T
  21. Circle(K, BallSize) → h
  22. Circle(L, BallSize) → k
  23. Circle(M, BallSize) → p
  24. Circle(N, BallSize) → q
  25. Circle(O, BallSize) → r
  26. Circle(P, BallSize) → s
  27. Circle(Q, BallSize) → t
  28. Circle(R, BallSize) → c_1
  29. Circle(S, BallSize) → d_1
  30. Circle(T, BallSize) → e_1
  31. Point(f) → U
  32. Point(f) → V
  33. Point(f) → W
  34. Point(f) → Z
  35. Point(f) → A_1
  36. Point(f) → B_1
  37. Point(f) → C_1
  38. Point(f) → D_1
  39. Point(f) → E_1
  40. Point(f) → F_1
  41. Point(g) → G_1
  42. Point(g) → H_1
  43. Point(g) → I_1
  44. Point(g) → K_1
  45. Point(g) → L_1
  46. Point(g) → M_1
  47. Point(g) → N_1
  48. Point(g) → O_1
  49. Point(g) → P_1
  50. Circle(U, BallSize) → f_1
  51. Circle(V, BallSize) → g_1
  52. Circle(W, BallSize) → h_1
  53. Circle(Z, BallSize) → k_1
  54. Circle(A_1, BallSize) → p_1
  55. Circle(B_1, BallSize) → q_1
  56. Circle(C_1, BallSize) → r_1
  57. Circle(D_1, BallSize) → s_1
  58. Circle(E_1, BallSize) → t_1
  59. Circle(F_1, BallSize) → c_2
  60. Circle(G_1, BallSize) → d_2
  61. Circle(H_1, BallSize) → e_2
  62. Circle(I_1, BallSize) → f_2
  63. Circle(K_1, BallSize) → h_2
  64. Circle(L_1, BallSize) → k_2
  65. Circle(M_1, BallSize) → p_2
  66. Circle(N_1, BallSize) → q_2
  67. Circle(O_1, BallSize) → r_2
  68. Circle(P_1, BallSize) → s_2
  69. Point(g) → J_1
  70. Circle(J_1, BallSize) → g_2