00574cam a22001814a 4500020002700000050001200027245005700039260005400096300002700150650001600177650001600193700002400209700002000233700002300253942000700276999001300283952009600296  a0309069955 (hardcover)00aQA135.500aAdding it up :bhelping children learn mathematics /  aWashington, DC :bNational Academy Press,cc2001.  axvii, 454 p. :bill. ; 0aMathematics 0aMathematics1 aKilpatrick, Jeremy.1 aSwafford, Jane.1 aFindell, Bradford.  cBK  c373d373  00104070aNCPDLbNCPDLd2015-04-28l0oQA135.5p0466r2025-07-04 00:00:00w2015-04-28yBK