Buy Casio FX 991 EX Classwiz Scientific Calculator
Got ahold of a Casio fx-991ex and CG-50 to match my Classpad II. I'm really impressed with them but there is something about the fx-991ex... (see comments) : r/calculators
Displaying values when using a formula in Spreadsheet mode - Casio Classwiz fx-991EX fx-570EX - YouTube
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Casio fx-991EX keeps giving math error for simple calculations like ((1/2)/2) and sin inverse (10) etc. Any idea on how to fix this? Is there a chance that the calculator may be
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Getting Started with CASIO FX-991EX FX-570EX CLASSSWIZ Full Manual learn all features - YouTube
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How fast is Casio FX-991EX ClassWiz as compared to other scientific non-programmable calculators? - Quora