Economopoulos, Karen.

Coins, coupons, and combinations : the number system / Karen Economopoulos and Susan Jo Russell. - Menlo Park, Calif. : Dale Seymour Publications, c1998. - vi, 178 p. : ill. ; 28 cm. - Investigations in number, data, and space .

"Developed at TERC, Cambridge, Massachusetts." "Grade 2, also appropriate for Grade 3".

ISBN: 1572326549

LCCN: 97195766

Subjects--Topical Terms:
Mathematics--Study and teaching (Elementary)

LC Class. No.: QA135.5 / .E28 1998

Dewey Class. No.: 372.7/2