Mathematics Teacher (1986) Vol. 79, No. 2
CHER FEBRUARY 1986 NATIONAL COUNCIL OF TEACHERS OF MATHEMATICS Halley's Comet Black Death Factoring mm Merrill solves problems f The Merrill mathematics programs for grades 7 through 12 help you get the results you want. Because each textbook is written by active, experienced teaching professionals. Look to Merrill mat
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