When Should We Teach Regrouping in Addition and Subtraction?
作者:
Jon M. Engelhardt,
Virginia Usnick,
期刊:
School Science and Mathematics
(WILEY Available online 1991)
卷期:
Volume 91,
issue 1
页码: 6-9
ISSN:0036-6803
年代: 1991
DOI:10.1111/j.1949-8594.1991.tb15558.x
出版商: Blackwell Publishing Ltd
数据来源: WILEY
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