00416nam a2200109 a 450000500170000000800410001705000230005810000200008124500840010199900190018595201020020420140414131939.0110125s19uu    xx            00    eng d  aTR 372.7bC81 2001  aCornell, Teresa  aMath riddles & mini-posters that build early problem-solving skills Grades K-2.  c112543d112543  001040aMUbMUcTRd2011-01-25l0oTR 372.7 C81 2001pM3880r2014-04-14 00:00:00w2014-04-14yBK