00680nam a2200181 a 450000500170000000800410001702000180005805000310007610000160010724500450012326000390016830000340020744000130024150000980025465000660035265000420041865000380046020140412111301.0001111s19uu    xx            00    eng d  a1-56107-645-7  aTR(GS 513.146bCOO771 1995  aCook, Marcy  aAirthmetornos B :blogica /cMarcy Cook.  aMountain View, CA :bCreative Pub.  a24p.(pt.1); 24p. (pt.2); ill.  aMathland  aStudent guide for grade 2.  Spanish text Two books in one "combinaciones de numeros" (part 2)  aArithmetic -- Problems, exercises, etc. -- Study and teaching  aSpanish language -- Reading materials  aLogic, symbolic and mathematicsal