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Casio FX CG20 Graphic Calculator Casio FX CG20 After years of doing COS TAN calculations in black and green the students of today can now calculate mathematics and other related disciplines in full colour thanks to the Casio FX CG20 br br According to Casio this is the first model of its kind that sets aside the Mono screen br br The full colour LCD display screen looks perfect with a natural illustration that shows fractions square roots and other numerical expressions in the same w
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