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Decimal Multiplication Area Model

Decimal Multiplication Area Model
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2018-04-17 19:24
Coordinate Geometry
This example demonstrates the area model for decimal multiplication. Key mathematical concepts include multiplication and decimals. Using GeoGebra commands such as Polygon, Midpoint, and Segment, an intuitive area model is constructed. Suitable for upper elementary or middle school students learning multiplication and decimals.

GeoGebra Commands & Parameters

  1. Polygon(A, D, F, B) → poly1, a_1, d_1, f, b_1
  2. Polygon(D, E, H, F) → poly2, d_2, e, h, f_1
  3. Polygon(F, H, I, G) → poly3, f_2, h_1, i, g
  4. Polygon(B, F, G, C) → poly4, b_2, f_3, g_1, c_1
  5. Midpoint(A, B) → J
  6. Midpoint(B, C) → K
  7. Midpoint(A, D) → L
  8. Midpoint(D, E) → M
  9. Segment(C, F) → l_1
  10. Segment(B, G) → m_1
  11. Segment(G, H) → n
  12. Segment(F, I) → p
  13. Segment(F, E) → q
  14. Segment(D, H) → r
  15. Segment(F, A) → s
  16. Segment(B, D) → t
  17. Intersect(s, t) → N
  18. Intersect(l_1, m_1) → O
  19. Intersect(n, p) → P
  20. Intersect(q, r) → Q
  21. Textfield(a) → InputBox1
  22. Textfield(b) → InputBox2
  23. Textfield(c) → InputBox3
  24. Textfield(d) → InputBox4