Device for teaching concepts of numbers and mathematical princip

Details Device for teaching concepts of numbers and mathematical princip Device for teaching concepts of numbers and mathematical princip

1977-08-08

1979-12-11

Grieb, William H.

G09B 1902, G09B 110

Patent

active

041775813

ABSTRACT:
The invention provides a device for teaching concepts of numbers and mathematical principles comprising a base component having a surface divided into a hundred identical unit squares in ten by ten format, and two series of number elements for use with the base component. Each number element of the first series is dimensioned so that it corresponds exactly in size and shape with a whole number of the unit squares on the base component and displays unit squares corresponding to those unit squares it covers on the base component when it is placed on the base component. Each number element of the first series is marked with the number which it represents in terms of the unit squares. Each number element of the second series has a length corresponding to ten unit squares and a width corresponding to a plurality of unit squares.
The displaying function of the first series can be achieved either by the number elements being sufficiently transparent to allow unit squares on the base component to be visible through the number elements, or alternatively, if the number elements are themselves opaque, then they can be marked with unit squares identical in size to those on the base component.
The invention further provides boxes wherein the number elements can be stored in a manner expressive of basic arithmetical functions.

REFERENCES:
patent: 1294126 (1919-02-01), Linay
patent: 3094792 (1963-06-01), Morgan et al.
patent: 3229388 (1966-01-01), Smith
patent: 3410002 (1968-11-01), Mulholland et al.
patent: 3414986 (1968-12-01), Stassen
patent: 3452454 (1969-07-01), Easton et al.
patent: 3935649 (1976-02-01), Harte

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