Are you sure? You can do calculations geometrically with tools like compasses and straight-edges. No need for numerals. Here's a practical way using a compass

Are you sure? You can do calculations geometrically with tools like compasses and straight-edges. No need for numerals. Here's a practical way using a compass and straight edge: https://janmr.com/blog/2010/04/arithmetic-by-geometry/ https://janmr.com/blog/2010/04/arithmetic-by-geometry/ Here's a contrived way, but using only a straight edge: https://en.wikipedia.org/wiki/Karl_Georg_Christian_von_Staudt#Algebra_of_throws https://en.wikipedia.org/wiki/Karl_Georg_Christian_von_Staud...