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RT Book, Whole SR Print DC OPAC T1 Developing number sense in the middle grades / Barbara J. Reys, with Rita Barger [et al.] ; consultants, Diana Lambdin Kroll ... [et al.] T2 Curriculum and evaluation standards for school mathematics A1 Reys, Barbara A1 Barger, Rita YR 1991 FD c1991 SP viii, 56 p. K1 Number concept in children -- Study and teaching (Elementary) PB National Council of Teachers of Mathematics PP Reston SN 0873533224 LA English (英語) CL LCC:QA141.15 CL DC20:372.7 NO Includes bibliographical references (p. 48) NO 書誌ID=BB00047026; NCID=BA17120780; LK [OPAC]https://nieropac.nier.go.jp/opac/opac_link/bibid/BB00047026 LK [Webcat Plus]http://webcatplus-equal.nii.ac.jp/libportal/DocDetail?hdn_if_lang=jpn&txt_docid=NCID:BA17120780; [Webcat Plus]http://webcatplus-equal.nii.ac.jp/libportal/EqualFromForm?txt_isbn=0873533224 OL 30