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Singapore Add/Subtract Bar 20 v1

Singapore Add/Subtract Bar 20 v1
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2020-05-01 12:40
FunctionCoordinate GeometryGeometric Construction
This example demonstrates the construction of a Singapore add/subtract bar. Key mathematical concepts include addition and subtraction. Using GeoGebra commands such as Random, Polygon, and Midpoint, a dynamic add/subtract bar can be created. Suitable for high-grade elementary or junior high school students to learn addition and subtraction.

GeoGebra Commands & Parameters

  1. Random(8, 20) → aA
  2. Random(2, aA - 2) → bB
  3. Polygon(P2, P3, P4, P5) → q1, p2, p3, p4, p5
  4. Polygon(P1, P2, P8, P7) → q2, p1, f, p8, p7
  5. Polygon(P6, P7, P8, P5) → q3, p6, g, h, i
  6. Midpoint(P3, P5) → A
  7. Midpoint(P2, P7) → B
  8. Midpoint(P8, P6) → C
  9. Random(1, 3) → qQ

AI Drawing Prompt Reference

Create an add/subtract bar diagram with two rectangles and one in the middle. First, generate two random numbers a and b, where a is between 8 and 20, and b is between 2 and a-2. Then, construct three rectangles using these numbers, with one in the middle and two on the sides. Next, find the midpoint of the middle rectangle, and generate a random number q between 1 and 3.
The prompt above was compiled from the original drawing commands and is for reference only.