Fuel Level (an amazing Geogebra 4.25 file in html5)

 

Click on picture to launch the ggb applet

or

follow this link

http://dmentrard.free.fr/GEOGEBRA/Maths/export4.25/carburant.html

Bwt: You can open this link directly in Geogebra

 

 

An applet from primary school with Geogebra 

http://dmentrard.free.fr/GEOGEBRA/Maths/Arithme/arithmetiques3.htm