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Fraction Division 3: a ÷ b (Grouping)

Fraction Division 3: a ÷ b (Grouping)
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2018-10-23 18:27
FunctionCoordinate GeometryGeometric Construction
In collections Fraction Division (2018)
This example demonstrates fraction division 3: a ÷ b (grouping). Key mathematical concepts include fraction division and grouping method. Using GeoGebra commands such as If, Point, Polygon, Sequence, and PolyLine, a dynamic demonstration of the grouping method is constructed. Suitable for middle school and above students to learn fraction division.

GeoGebra Commands & Parameters

  1. If(a < b, If[GCD[a, b] ≟ 1, 2, 3], If[Mod[a, b] ≟ 0 ∨ GCD[a, b] ≟ 1, 3, 4]) → steps
  2. Point(Segment[A - (0, 0), A - (0, 3)]) → B
  3. Point(Sequence[A + (i, 0), i, 0, a]) → C
  4. Polygon({B, C, C + (0, 1), B + (0, 1)}) → poly1
  5. Polygon({A, A + (a, 0), A + (a, 1), A + (0, 1)}) → poly2
  6. Sequence(Translate[pic2, Vector[(0, 0), (i, 0)]], i, 0, a - 1) → L_1
  7. Sequence(Translate[pic3, Vector[(0, 0), (i, 0)]], i, 0, b - 1) → L_2
  8. Sequence(Polygon[{A + (((i - 1) * b), 0), A + ((i * b), 0), A + ((i * b), 1), A + (((i - 1) * b), 1)}], i, 1, n) → list2
  9. Sequence(Sequence[Segment[B + ((b * (i - 1)) + j, 0), B + ((b * (i - 1)) + j, 1)], j, 1, b - 1], i, 1, 1) → list3
  10. Polygon({B, B + (b, 0), B + (b, 1), B + (0, 1)}) → q1
  11. PolyLine(B - (0, 0.2), B + (0, -0.3), B + (b / 2, -0.3), B + (b / 2, -0.4), B + (b / 2, -0.3), B + (b, -0.3), B + (b, -0.2)) → f