Universal mathematical scale A1. and A2. set

摘要

By sliding the triangle on A1 under any number on A2., the triangle gives the answers to many different problems at one single move.;For example:;Place the triangle under 9 of scale A2., one will have the answers to 19 different problems.;Based on the instructions of the scales, when one finds the answer to one problem, one finds the answers to multiple problems at once.;Therefore, the triangle knows all.;It has an indefinite number vocabulary system like no other invention.;Scale A2., Numbers are written down horizontally {0 through 19} with the same space between each number and;Scale A1. must have the same distance as A2.;By doing this, the numbers will, line-up vertically.;And once lined-up, the pyramid or triangle knows all.;One can master addition and subtraction with this invention in a small amount of time.