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
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Fractions, Decimals and Exponents with Casio fx991EX (Mini-Math Lesson w/Karen Greenhaus) - YouTube
Casio FX-991EX Class Wiz Calculator w/ Slide Cover Tested | eBay
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Casio FX-991EX Classwiz Scientific Calculator 552 Function | eBay
Conversion of Unit in Casio fx-991EX Classwiz - YouTube
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Casio FX991EX Classwiz Scientific Calculator ( Black/Pink/Blue, Solar Power) | eBay
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Casio V.P.A.M. calculators - Wikipedia
File:Casio fx-991EX.jpg - Wikimedia Commons
Amazon.com : CASIO FX-991EX Advanced Engineering/Scientific Calculator (UK Version), Black : Office Products
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Eddie's Math and Calculator Blog: Comparison: Casio fx-991EX Classwiz Vs Sharp EL-W516T
Amazon.com : Casio FX-991ES Plus Scientific Calculator Fx 991 Es - New & Sealed ship to world wide : Office Products
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Casio fx-991EX and fx-991CW : r/calculators
Casio FX-991EX Advanced Scientific Calculator, High Resolution Screen, Black - Walmart.com
Casio FX991EX Classwiz Scientific Calculator for sale online | eBay
