Patent ID: 7827221

Claim:
A fraction display apparatus comprising: a display unit with a display screen; a mixed fraction display setting unit that sets on the display screen an integer part display area, a numerator display area, a vinculum, and a denominator display area for a mixed fraction; a numerical expression component input unit by which numerical expression components including at least a numeral, an operator and a bracket are inputted manually to the apparatus; a display position control unit that inputs the numerical expression components inputted by the numerical expression component input unit to the corresponding integer part display area, numerator display area and denominator display area for displaying purposes; an operator input prohibiting unit that prohibits the display position control unit from inputting the operator inputted by the numerical expression component input unit to the integer part display area when nothing or only numerical values are in the integer part display area; and an operator input allowing unit that when an open bracket and a numeral are inputted in this order in the integer part display area, starting with its head, allows the display position control unit to input the operator at a position after the numerical value in the integer part display area.