A Physical Model for Operations with Integers
Several models for operations with integers are shown. The model for the product of two negatives was discovered by a sixth-grade student.
2002 ◽
Vol 12
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pp. 107-117
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2008 ◽
Vol 10
(4)
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pp. 228-242
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1993 ◽
Vol 30
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pp. 401-426
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2014 ◽
Vol 6
(6)
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pp. 7-9
1969 ◽
Vol 2
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pp. 149-152
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