The Abacus is a tool for the addition and subtraction of numbers.
Head arithmetic is especially important when you have no calculator at the moment.
How long does it take until the last gear wheel is moving for one cog?
Fraction calculation in daily version. Different sized pizza slices are waiting in the pizza oven, to be reassembled on the plate.
In this exhibit equations can be visualised with a scale.
This is a playable method for kids to learn the multiplication tables. The different regularly stars give the opportunity for self-control.
EuroScience Productions GmbH