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An ordered pair approach to addition of rational numbers in...

An ordered pair approach to addition of rational numbers in second grade

FRANCIS HOWARD HILDEBRAND and NELLIE JOHNSON
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Volume:
12
Language:
english
Journal:
The Arithmetic Teacher
DOI:
10.2307/41185100
Date:
February, 1965
File:
PDF, 400 KB
english, 1965
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