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My FX-991EX seems to be stuck. It's not taking any inputs and not responding to reset button. : r/calculators
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Amazon.com : CASIO FX-991EX Advanced Engineering/Scientific Calculator (UK Version), Black : Office Products
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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
How to Reset a Casio FX-991EX or FX-570EX CLASSWIZ Calculator - YouTube
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Eddie's Math and Calculator Blog: Comparison: Casio fx-991EX Classwiz Vs Sharp EL-W516T
fx-991EX | ClassWiz | Non programmable | scientific calculator | CASIO
