Education and demonstration – Mathematics – Arithmetic
Patent
1994-03-24
1997-07-08
Smith, Jeffrey A.
Education and demonstration
Mathematics
Arithmetic
434191, 434207, 434209, G09B 134
Patent
active
056454317
ABSTRACT:
An apparatus and method for teaching mathematical expressions includes a plurality of four-sided members that represent the variables of factors of a mathematical expression. Each four-sided member has a different area representing a different variable in the mathematical expression. The apparatus enables a math student to visualize the rules that apply to mathematical expressions. The four-sided members include a first side having a first color and a second side having a second color, different from the first color, wherein the first side represents a positive number, and the second side represents a negative number. The four-sided members can be used for teaching by illustration simple multiplication and division, multiplication, division and factorization of polynomials, linear equations including inequations and absolute value, and systems of linear equations.
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patent: 3858332 (1975-01-01), Rasmussen
patent: 4332567 (1982-06-01), Nogues
patent: 4419081 (1983-12-01), Steinmann
patent: 4548585 (1985-10-01), Kelly
patent: 4645461 (1987-02-01), Mortensen
patent: 4979749 (1990-12-01), Onanian
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