Fraction learning kit (Bruchrechen Lernmaterial)
thingiverse
Children can understand equivalence between fractions, like 2 1/8 being equal to 1/4, by physically stacking the 1/8 portions on top of the 1/4 piece. Advanced learners can add fractions together by placing them on a plate and counting its sections. The most complex calculation possible is 1/2 + 1/6 = 2/3, achieved by using a 3/3 plate as a base. For finer details or non-standard printing materials, you may need to adjust settings in OpenSCAD.
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