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Comparing Fractions for Primary 3

Comparing Fractions for Primary 3
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2020-05-25 20:40
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This example demonstrates how to visually compare and order fractions, covering core concepts like fraction comparison, numerators and denominators, and equivalent fractions. It uses GeoGebra commands such as Sequence, CircleSector, Segment, Vector, and LCM. Ideal for Primary 3 students to learn basic fraction concepts and comparison methods.

GeoGebra Commands & Parameters

  1. Sequence((sqrt(2) * cos(i * 360 * ° / den1) + x(B), sqrt(2) * sin(i * 360 * ° / den1) + y(B)), i, 1, den1) → leftpts
  2. Sequence((sqrt(2) * cos(i * 360 * ° / den2) + x(A), sqrt(2) * sin(i * 360 * ° / den2) + y(A)), i, 1, den2) → rightpts
  3. Sequence(Segment[B, Element[leftpts, i]], i, 1, den1) → segleft
  4. Sequence(Segment[A, Element[rightpts, i]], i, 1, den2) → segright
  5. CircleSector(B, Element[leftpts, den1], Element[leftpts, num1]) → e
  6. CircleSector(A, Element[rightpts, den2], Element[rightpts, num2]) → f
  7. Segment(D, C) → a
  8. Vector(F, E) → u
  9. Vector(G, H) → v
  10. Sequence((-5 + i * 10 / den1, 0), i, 0, den1) → list1
  11. Sequence((-5 + i * 10 / den1, 1.3), i, 0, den1) → list2
  12. Sequence(Segment[Element[list1, i], Element[list2, i]], i, 1, den1 + 1) → list3
  13. Sequence((-5 + i * 10 / den2, 0), i, 0, den2) → list4
  14. Sequence((-5 + i * 10 / den2, -1.3), i, 0, den2) → list5
  15. Sequence(Segment[Element[list4, i], Element[list5, i]], i, 0, den2 + 1) → list6
  16. LCM(den1, den2) → b
  17. Sequence((-5 + i * 10 / b, 0), i, 0, b) → list7