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Number Line Rounding v2

Number Line Rounding v2
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2017-06-24 07:58
SequenceCoordinate GeometryGeometric ConstructionSlider Animation
In collections Elementary School Applets
This example demonstrates rounding on a number line. Key mathematical concepts include number line representation and rounding rules. Using GeoGebra commands such as Vector, SelectedElement, Sequence, Textfield, Element, Translate, and Text, users can visually understand the rounding process. Suitable for high-grade elementary and junior high school students learning number lines and basic arithmetic operations.

GeoGebra Commands & Parameters

  1. Vector(A, B) → u
  2. SelectedElement(roundtolist) → roundto
  3. Sequence((-10 + i, 0), i, 0, 30) → alldots
  4. Textfield(inputseedtext) → InputSeed
  5. Sequence(Text[startline + (roundto * i), (i, 0) + u], i, 0, 10) → labeltext1
  6. Sequence(startline + (roundto * i), i, 0, 10) → labelvalues1
  7. Element(labelvalues1, floor((inputseednumber - startline) / roundto) + 1) → startline2
  8. Translate(Locate0, Vector[(slideit1 * Vector[Locate0, Locate1])]) → Locate0'
  9. Translate(Locate1, Vector[(slideit2 * Vector[Locate1, Locate2])]) → Locate1'
  10. Translate(UpperBoundTextAdjuster, Vector[(slideit2 * Vector[UpperBoundTextAdjuster, (10, -3) + u])]) → UpperBoundTextAdjuster'
  11. Translate(LowerBoundTextAdjuster, Vector[(slideit2 * Vector[LowerBoundTextAdjuster, (0, -3) + u])]) → LowerBoundTextAdjuster'
  12. Sequence(Text[startline2 + (roundto / 10 * i), (i, -3) + u], i, 0, 10) → labeltext2
  13. Translate((locatelowerbound - 1, 0), Vector[(slideit2 * Vector[(locatelowerbound - 1, 0), C])]) → E
  14. Translate((locateupperbound - 1, 0), Vector[(slideit2 * Vector[(locateupperbound - 1, 0), D])]) → F
  15. Sequence((-10 + i, -3), i, 0, 30) → alldots2
  16. Text(inputseedtext, Locate1' + (-0.33, 0.49), true, true) → inputseedtext2
  17. Text(startline2 + roundto, UpperBoundTextAdjuster' + (-0.15, -0.2)) → upperbound
  18. Text(startline2, LowerBoundTextAdjuster' + (-0.2, -0.2)) → lowerbound
  19. Sequence(Text[VerticalText[TableText[{{" " + (startline + (roundto * i)), " "}}, "vc"]], (i, 0) + (-0.2, 0), true, true], i, 0, 10) → list1

AI Drawing Prompt Reference

Draw a number line from -10 to 10 with marks every 1 unit. Choose a point on the number line as the input seed point. Based on the input seed point and the number line unit, mark the rounded value and illustrate the rounding rules and results. Use sliders to adjust the scale and movement of the number line, and adjust the position of the text labels accordingly.
The prompt above was compiled from the original drawing commands and is for reference only.