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Casio
£139.99
£84.99
The Casio FX-991EX Scientific Calculator is a key stage 3, 10-Digit(x2 lines) calculator that is ideal for ages 11-16+. It features a twin line 10+2 digit natural textbook display, 403 functions, multi-replay, Matrix/vector, S-VPAM logic. It comes in a slide-on hard plastic case. It can be used for regression analysis, calculus (numerical integration, numerical derivative), physical constants, metric conversions, equations (polynomial, simultaneous).