Patent ID: 6192594
Filing Date: 2001-02-27
Classification: G01B

Abstract:
An educational apparatus used for the teaching of mathematical operations using fractions comprising:a prism having at least three side surfaces substantially identical in surface area that are joined together at common edges and have two connecting joined backs, one of which is located at each end of the joined surfaces to form a solid prism; andeach of said different prism side surfaces having a plurality of fractional measuring scales of the same length and different fractional numerical values thereon, at least one of the measuring scales representing the whole unit whose fractional values are stated on the other different measuring scales, each of said measuring scales being adjacent to one of the common joined prism edges,wherein there are four of said different fractional measuring scales on each surface side with two of said side scales being aligned and adjacent with each other and inverted from the two other fractional measuring scales on the same surface.