Fourteen different strategies for multiplication of...

Fourteen different strategies for multiplication of integers or why (⁻1) (⁻1) = ⁺1

JOHN C. PETERSON
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Volume:
19
Language:
english
Journal:
The Arithmetic Teacher
DOI:
10.2307/41188049
Date:
May, 1972
File:
PDF, 801 KB
english, 1972
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