Casio: FX-991 ES Plus 2nd Edition

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FX-991 ES Plus Natural-V.P.A.M FX-991 ES Plus is a non-programming and non-graphing calculator with 417 function New functions: New equation mode Random integers Standard functions : Fraction calculations Combination and permutation Statistics (List-based STAT data editor, standard deviation, regression analysis) 9 variables Table function Comes with new slide-on hard case Power Supply: Solar & Battery Approximate battery life Main 3 years Auto Power off  Show more