I find it very difficult to explain generally to the whole class on what keys to press when doing some calculations based on functional keys like cube root, index/powers, and even trig ratios or so. The problem is that calculator are designed and programmed by different companies as a result their functional of logic/programming is not the same. I have to first check on what calculator the student is using an then explain relevantly to the order of the logic it follows. Really confusing for some students as they sometimes share or borrow different calculators at a time.
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