this post was submitted on 07 Aug 2024
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submitted 3 months ago* (last edited 3 months ago) by toni_bmw to c/[email protected]
 
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[–] [email protected] 4 points 3 months ago (2 children)
[–] [email protected] 6 points 3 months ago

here I found a video demonstrating that kind of machine, not the same brand and model but very similar. the vid's is French tho : https://youtu.be/vOGtYgu7V7Q

[–] [email protected] 3 points 3 months ago

Stick a pen tip into the slot at one of the numbers and scrape it upwards for adding, downwards for substraction.

The display updates with the new sum.

Mine came with more complicated instructions for handling more advanced forms of math, as well, but I immediately forgot those.