Education and demonstration – Mathematics – Arithmetic
Reexamination Certificate
2005-08-09
2005-08-09
Fernstrom, Kurt (Department: 3712)
Education and demonstration
Mathematics
Arithmetic
C434S188000, C434S208000, C434S209000
Reexamination Certificate
active
06926530
ABSTRACT:
A game apparatus and a method for assisting in teaching the addition and subtraction of positive and, especially, negative numbers, are based on the Null Theory of Adding and Subtracting Positive and Negative Numbers. The apparatus comprises (a) a plurality of positive units, (b) a plurality of negative units, (c) a demarcated playing zone, and (d) a means for measuring the number of free positive units and free negative units within the demarcated playing zone. Within the demarcated playing zone, free positive units combine with free negative units zone to form null units, with each null unit comprising an equal number of positive units and an equal number of negative units. Each null unit preferably comprises one positive unit and one negative unit.
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