Casio Fraction Calculator FX-65

model- fx-65 desc.- casio inc. calculator features- fraction mate calculator * large color-coded keys are grouped by function * shift key color is the same as shift key function graphics * hard plastic keys resist abuse * solar powered with battery backup for operation in any lighting situation * large display shows 10-digit mantissa plus 2-digit exponent (10+2) * fixed decimal scientific and engineering display notation options * performs calculation according to standard mathematical priorities (mdas order) * 18 levels of parenthesis with up to 6 pending operations * two programmable constant functions simplify repetitive calculations and conversions * clear last entry or clear all entries * backspace/correction key erases last digit or returns to previous calculation * perform basic (+ - x /) exponential logarithmic and trigonometric computations using fractions * fractions are displayed using true fraction display with the numerator over the denominator. * pi is displayed symbolically in fractions. * disp