00670    a2200145   4500003000500000005001700005040000900022082003300031245007800064250001700142260004000159300001100199505029800210650001600508Nust20230705092715.0  cNust  a510,DENbDenholm, Richard A.  aMathematics :bstructure and skills /cRichard A. Denholm & V. Dale Blank  aSecond book   aCaliforniabDept of Educationc1970  a471 p.  aNumeration Systems (Page-1), Number Ideas and Patterns (Page-55), Numbers of Arithmetic (Page-115), Geometry (Page-177), Introduction to Integers (Page-227), Number Phrases and Sentences (Page-275) Congruence (Page-321), Rate Ratio and Percents (Page-371), Extending Number Systems (Page-417).  aMathematics