Search
Google ClassroomGoogle Classroom
GeoGebraGeoGebra Classroom

Outline

  1. Estimation Routines - ICTM 2016
    1. Featured
    2. See also

    Estimation Routines - ICTM 2016

    Author:John Ulbright
    Estimation Routines - ICTM 2016

    Table of Contents

    • Featured

      • How Many?
      • Placing Numbers (up to 50)
      • Fraction Guesser
      • Broken Clock (nearest minute)
      • What's the number? -- decimal version
      • Part-Whole Rectangles
      • Relative number sizes via area
      • Rounding within 1000
      • What's the angle?
      • Slope Guesser
    • See also

      • Given Part Find Whole
      • Mystery Point
      • b^x on the number line
      • What's the number? -- decimal version
      • Relative Unit Sizes (Length)
      • Dynamic Correlation
    Next
    How Many?

    New Resources

    • Addition within Two Places
    • רישום חופשי
    • גיליון אלקטרוני להעלאת נתוני בעיה ויצירת גרף בהתאם
    • Dividing a 2-digit number by a 1-digit number (2)
    • Interactive Unit Circle - Exact Trig Values

    Discover Resources

    • Παράλληλες χορδές σε κύκλο
    • Coordinate Rules for Reflections
    • Visual computation of sum 1/a^n

    Discover Topics

    • Conditional Probability
    • Cosine
    • General Quadrilateral
    • Cuboid
    • Ratios
    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

    © 2025 GeoGebra®