| 摘要 |
An apparatus for teaching mathematical concepts is set forth. The apparatus includes a display. A code for at least one ones number is selected from the group consisting of Arabic numerals 0,1,2,3,4,5,6,7,8,9. At least one non-numeric shape for at least one tens number is selected from sets of numbers, the sets of numbers consisting of 10-19, 20-29, 30-39, 40-49, 50-59, 60-69, 70-79, 80-89, and 90-99. The code and the at least one non-numeric shape are presented in association with one another on the display to form a numerical identity. The numerical identity has a value determined by the code and the at least one non-numeric shape.
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