Stage: 3 and 4 Challenge Level: 
Click here to download the Excel file called Equivalent Fraction Bars.
(Right click and use "Save target as" to save the file on your own machine.)
Set the numerator and denominator. The top bar will automatically form into sections to show this fraction.
Turn on the middle bar to see a fraction equivalent to this but with a denominator twice that of the top bar.
The bottom bar represents another fraction equivalent to the top bar but with a denominator three times greater.
Complex numbers. Spreadsheets. Making and proving conjectures. Interactivities. Rotations. Dynamic geometry. Visualising. Games. Mathematical reasoning & proof. Learning through exploration.
Published February 2003.
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email: nrich@damtp.cam.ac.uk
