Pedagogic calculating machine for arithmetic instruction

Details Pedagogic calculating machine for arithmetic instruction Pedagogic calculating machine for arithmetic instruction

1988-08-12

1990-09-04

Malzahn, David H.

Boots, shoes, and leggings

36470907, G06F 1520

Patent

active

049549774

ABSTRACT:
Calculating machine comprising a microprocessor (1) controlling the operations carried out by the machine, a stack (2) of shift registers connected to the microprocessor and intended for the temporary storage of the numbers with which the operations are to be carried out, a read only memory (ROM) (7) containing the programs relating to the functions of the machine, a display controller (5) connected to the microprocessor (1) and to the ROM (7) and a screen (10) for displaying results, characterized in that it furthermore has means for displaying on the display screen (10) of the machine educational information relating to the mathematical rules governing the operation carried out by the machine.

REFERENCES:
patent: 3787988 (1974-01-01), Nakajima et al.
patent: 4225932 (1980-09-01), Hirano
patent: 4346450 (1982-08-01), Matsuyama
patent: 4481598 (1984-11-01), Ishiwata
patent: 4488250 (1984-12-01), Lipsey
patent: 4545022 (1985-10-01), Hughins
patent: 4580235 (1986-04-01), Yanagawa

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