Qualitative and numerical reasoning about fractions and ratios by 7th and 8th grade students

P. Heller, Thomas R. Post, M. Behr, R. Lesh

Research output: Contribution to journalArticlepeer-review

Original languageEnglish
Pages (from-to)388-402
JournalJournal for Research in Mathematics Education
Volume21
StatePublished - Nov 1990

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