ABACUS TYPE CALCULATOR CAPABLE OF PROCEEDING ABACUS TYPE CALCULATOR METHOD FOR FOUR FUNDAMENTAL ARITHMETIC OPERATIONS

摘要

PURPOSE: An abacus type calculator is provided to remove recalculation caused by an incorrect answer of a calculated number by calculating a next number after moving the calculated number to a fixed number plate unit through a number transfer bar.;CONSTITUTION: A button unit of five digit numbers(105) is arranged in the center of an upper side of an abacus type calculator body(100). The button units of 4 digit(104), 3 digit(103), 2 digit(102), single digit(101) is arranged under the center. A fixed number plate unit(600) and a varying number plate unit(500) are arranged on the top of the respective abacus type button unit. A mark function unit for four fundamental arithmetic operations(200,300) are respectively arranged in right/left sides of the abacus type button unit. A number transfer bar(400) moves the calculated number from the varying number plate unit to the fixed number plate unit.;COPYRIGHT KIPO 2010