01062cam a2200277 a 4500 3575560 OSt 20151123171038.0 990401s1999 nhua b 000 0 eng 99023286 032500126X (pbk. : alk. paper) (DLC) 99023286 DLC PUL PUL QA135.5 .T685 1999 372.7/044 21 Trafton, Paul R. Learning Through Problems : Number Sense and Computational Strategies : A Resource for Primary Teachers. Paul R. Trafton & Diane Thiessen. Portsmouth, NH : Heinemann, c1999. ix, 116 p. : ill. ; 22 x 28 cm. Includes bibliographical references (p. 115-116). Mathematics Study and teaching (Primary) Thiessen, Diane. 7 cbc orignew 1 ocip 19 y-gencatlg lcc BK 31081 31081 0 0 lcc 0 0 NFIC PUEA PUEA GEN 2015-11-23 Books for Africa 1600.00 2015-11587 0 QA135.5 .T685 1999 2015-3580 2015-11-23 00:00:00 1 2015-11-23 BK