$2.70
Printed using a 0.4 mm nozzle, print the first two layers or 0.4mm in white and then switch to black for the best legibility. This slide ruler makes math easy and fast. Any fraction made on any part of the slide ruler make the same ratio between any other sets of number on the slide ruler. This make simplifying fractions and doing devision a breeze and make multiplication a mater of making a fraction and matching it upwards. Tens places are handled in your head: 1 over 2 is the same position on the scales as 1 over 20 and 100 over 2 etc...
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Circular Slide Rule
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Creative Commons Attribution-NonCommercial-NoDerivatives
You can download and share as long as you credit the creator, but you cannot change the material or use it for commercial purposes.
Licensed under CC BY-NC-ND
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