Apparatus for teaching the addition and subtraction of whole numbers through the use of objects
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United States of America Patent
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Jun 25, 1996
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N/A
app pub date -
Sep 29, 1994
filing date -
Sep 29, 1994
priority date (Note) -
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Abstract
Apparatus for teaching the addition and subtraction of whole numbers through the use of objects comprising a sheet with three containers across in a row, the containers of the row being separated by a mathematical sign (+ or -), and the second and third containers being separated by an equals sign (=); and a plurality of objects, the objects being of a similar shape but with distinctive markings thereon; whereby when some of the devices are placed in the first container and others in the second container, the third container may be filled by the child with the objects representing the result of the mathematical process to be performed.
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