Mathematics teaching device

Details Mathematics teaching device Mathematics teaching device

1997-04-11

1998-06-02

Smith, Jeffrey A.

Education and demonstration

Mathematics

Arithmetic

434191, 434345, 434347, G09B 116

Patent

active

057590419

ABSTRACT:
A multiplication table teaching device having a body, the body having a front side and a back side, the front side having 55 multiplication problems located thereon and the back side having located thereon 55 answers corresponding to the multiplication problems located on the front side, the body having 55 body holes permitting the passage therethrough from the front side and the back side.

REFERENCES:
patent: 1400887 (1921-12-01), Liebman
patent: 2769640 (1956-11-01), Elder
patent: 3456364 (1969-07-01), Alexander
patent: 3735504 (1973-05-01), Fedyna
patent: 4445865 (1984-05-01), Sellon

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