Fraction exploration device
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United States of America Patent
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Jan 11, 2005
Grant Date -
N/A
app pub date -
Feb 24, 1998
filing date -
Feb 24, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A fraction exploration device for teaching various mathematical principles related to fractions, comprising a base sheet having printed indicia thereon, a ruler attached pivotally to the base sheet. The printed indicia on the base sheet include intersecting grid lines which define a matrix of intersections and a series of parallelograms therebetween. Fractions are located at a plurality of the intersections of the grid lines, each fraction having a numerator, a denominator and a dividing line separating the numerator from the denominator. The dividing line of each fraction is sloped to represent a mathematical relationship of the numerator to the denominator.
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