01162nam a22002651 4500 3584822 BD-DhUL 20140821081159.0 720107r19611960ohua b 000 0 eng 61013900 DLC DLC DLC BD-DhUL QA135.5 .O755 510 OSE Osborn, Roger. Extending mathematics understanding [by] Roger Osborn [and others] Columbus, Ohio : C. E. Merrill Books , 1961. viii, 310 p. : ill. ; 24 cm. Earlier ed. copyright 1960 under the titles Toward improved understanding of mathematics, part I and Toward improved understanding of mathematics, part II, by M. V. DeVault, published in 1960. Revised in 1969, published separately in two volumes under the titles Understanding the number system and Extending understandings of mathematics. Bibliography: p. 264-271. Mathematics Study and teaching (Elementary) DeVault, M. Vere. Toward improved understanding of mathematics. 7 cbc orignew u ocip 19 y-gencatlg ddc BK 4510 4510 0 0 ddc 0 510_000000000000000_OSE 0 NFIC 7991 DUSL DUSL GEN 2014-08-21 Gift 510 OSE A49134 2014-08-21 4 2014-08-21 BK 0 0 ddc 0 510_000000000000000_OSE 0 NFIC 7992 DUSL DUSL GEN 2014-08-21 Gift 510 OSE A43141 2014-08-21 2 2014-08-21 BK 0 0 ddc 0 510_000000000000000_OSE 0 NFIC 7993 DUSL DUSL GEN 2014-08-21 Gift 510 OSE A25566 2014-08-21 1 2014-08-21 BK