FOSNOT, CATHERINE TWOMEY JACOB, BILL BEST BUYS, RATIOS, AND RATES - FIRST EDITION - PORTSMOUTH FIRSTHAND 2007 - 78P. - CONTEXTS FOR LEARNING: MATHEMATICS . AN IMPRINT OF HEINEMANN ISBN: 0325010267 Subjects--Topical Terms: MATHEMATICSADDITIONSUBTRACTIONFRACTIONS Dewey Class. No.: 510/JAC