Abstract

Disclosed is a check calculator as a preferred embodiment of the present invention, which is characterized in that;It displays the amount of the check drawn on a payee and the deposit balance after the check has been drawn on a payee, then instructs either writing or reading of the number of the check drawn on a payee in response to specific operations of the keys provided, more particularly, when drawing a check on a payee, in responding to the reading operation of the reading key, the check calculator reads out the number of the check to be drawn next on a payee and also reads the deposit balance after the check has been drawn on a payee.As a still further embodiment of the present invention, disclosed is a check calculator characterized in that;It adds the input amount to the balance of the current account with the activated deposit key so that the input can be memorized as the new balance of the current account, then subtracts the input amount of the check drawn out from the deposit balance of the current account by operating the check key so that the result can be memorized as the new balance of the current account, and simultaneously, a digital number "1" is added to the check number memorized so that the result of this addition can be memorized as the new check number, and more particularly, the check calculator voids the deposit balance of the current account or amount of the check that is incorrectly input, by applying a very simple operation with the void key provided.