Search
Google ClassroomGoogle Classroom
GeoGebraGeoGebra Lesson

Outline

  1. Estimation Routines with GeoGebra
    1. How Many?
    2. Placing Numbers (up to 50)
    3. Fraction Guesser
    4. What's the number?
    5. Part-Whole Rectangles
    6. Broken Clock (nearest minute)
    7. Relative number sizes via area
    8. Rounding within 1000
    9. What's the angle?
    10. Slope Guesser

Estimation Routines with GeoGebra

Author:John Ulbright

  • How Many?

  • Placing Numbers (up to 50)

  • Fraction Guesser

  • What's the number?

  • Part-Whole Rectangles

  • Broken Clock (nearest minute)

  • Relative number sizes via area

  • Rounding within 1000

  • What's the angle?

  • Slope Guesser

Next
How Many?

New Resources

  • Writing and Graphing Proportional Relationships (k>0)
  • Graphing Basic and Compound Inequalities
  • Building Algebra Tile Models for Trinomials
  • Rossler's Attractor
  • Midpoint Theorem (V2): Integer Solutions

Discover Resources

  • sumofangles
  • Wat zie je?
  • Abacus
  • Square Action!
  • Urbano Parallel Lines and Transversals

Discover Topics

  • Geometric Distribution
  • Solids or 3D Shapes
  • Quadrilaterals
  • Step Functions
  • Quadratic Functions
AboutPartnersHelp Center
Terms of ServicePrivacyLicense
Graphing CalculatorCalculator SuiteMath Resources

Download our apps here:

Download_on_the_App_Store_Badge_US-UK_RGB_blk_4SVG_092917

© 2026 GeoGebra®