Mathematics device

Details Mathematics device Mathematics device

1978-09-05

1980-11-18

Skogquist, Harland S.

35 77, G09B 1902

Patent

active

042337577

ABSTRACT:
A mathematics device in which 100 cubes are arranged in parallel rows with 10 cubes in each row and rotatably mounted on a supporting rod. A rectangular frame encloses all of the cubes and supports the rods. Each cube has four peripheral faces, each face having a different color and having numbers thereon for use in adding, subtracting, multiplying, dividing and improper fractions. Also, the two sides of the frame are numbered from 1 to 10 to represent the rows of cubes while the two ends of the frame are numbered from 1 to 10 and the cubes in each row are aligned under these numbers into ten columns. Spacing members are mounted on each rod and positioned between adjacent cubes and markers are provided to be removably mounted on the rods and between adjacent cubes and are used in solving various mathematical problems.

REFERENCES:
patent: 342737 (1886-05-01), Dougherty
patent: 422612 (1890-03-01), Neuhaus
patent: 1233544 (1917-07-01), Bissey
patent: 3935649 (1976-02-01), Harte

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