Casio FX-55 Overhead Calculator
The Educator OH-55 Overhead Calculator emulates the Casio FX-55 with true fraction display that shows numerator over denominator.
Features include simplification key to reduce fractions, integer division, decimal to fraction, algebraic logic for correct order of operations, backspace, reciprocals, and 18 levels of parentheses. Other functions include %, square root, pi, x^2, x^y, l/x, xy, and xm.
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