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Number Line Subtraction

Number Line Subtraction
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2017-08-16 05:20
Coordinate GeometryGeometric ConstructionSlider Animation
This example demonstrates subtraction on a number line. Key mathematical concepts include the number line and subtraction. Using GeoGebra commands such as Point, Semicircle, Intersect, etc., the example constructs a visual representation of number line subtraction. Suitable for upper elementary or middle school students to learn subtraction.

GeoGebra Commands & Parameters

  1. Point(xAxis) → D
  2. Point(xAxis) → C
  3. Semicircle(C, D) → c
  4. Intersect(c, xAxis, 1) → B_1
  5. OrthogonalLine(B_1, xAxis) → i
  6. Point(i) → F_1
  7. Point(xAxis) → A
  8. Segment(A, Ans) → a
  9. Line(D_1, a) → j
  10. OrthogonalLine(A, j) → m
  11. Intersect(m, j) → I_1
  12. Point(xAxis) → E
  13. Point(xAxis) → F
  14. Point(xAxis) → G
  15. Point(xAxis) → H
  16. Point(xAxis) → I
  17. Point(xAxis) → J
  18. Point(xAxis) → K
  19. Point(xAxis) → L
  20. Point(xAxis) → M
  21. Point(xAxis) → N
  22. Point(xAxis) → O
  23. Point(xAxis) → Q
  24. Point(xAxis) → R
  25. Point(xAxis) → S
  26. Point(xAxis) → T
  27. Point(xAxis) → U
  28. Point(xAxis) → V
  29. Point(xAxis) → W
  30. Point(xAxis) → Z
  31. Point(xAxis) → A_1
  32. Semicircle(D, E) → d
  33. Semicircle(E, F) → e
  34. Semicircle(F, G) → f
  35. Semicircle(G, H) → g
  36. Semicircle(H, I) → h
  37. Semicircle(I, J) → k
  38. Semicircle(J, K) → p
  39. Semicircle(K, L) → q
  40. Semicircle(L, M) → r
  41. Semicircle(M, N) → s
  42. Semicircle(N, O) → t
  43. Semicircle(O, Q) → c_1
  44. Semicircle(Q, R) → d_1
  45. Semicircle(R, S) → e_1
  46. Semicircle(S, T) → f_1
  47. Semicircle(T, U) → g_1
  48. Semicircle(U, V) → h_1
  49. Semicircle(V, W) → k_1
  50. Semicircle(W, Z) → p_1
  51. Semicircle(Z, A_1) → q_1
  52. OrthogonalLine(Ans, a) → b
  53. Intersect(b, j) → E_1
  54. Polygon(F_1, C_1, I_1, A) → poly1, b_1, j_1, l_1, m_1
  55. Point(xAxis) → G_1
  56. OrthogonalLine(G_1, j) → l
  57. Intersect(l, j) → H_1
  58. Polygon(H_1, G_1, A, I_1) → poly2, t_1, b_2, c_2, e_2
  59. Polygon(E_1, Ans, G_1, H_1) → poly3, a_1, i_1, n_1, s_1
  60. Polygon(D_1, E_1, Ans, F_1) → poly4, a_2, d_2, f_2, g_2
  61. Point(xAxis) → L_1
  62. Semicircle(M_1, L_1) → r_1
  63. Point(xAxis) → N_1
  64. Point(xAxis) → O_1
  65. Line(N_1, O_1) → n
  66. Midpoint(a) → J_1