Putting together and taking apart
Subtitle: addition and subtraction
By: Karen Economopoulos, Susan Jo Russel
Contributors: Russell, Susan Jo; TERC (Firm)
Series: Investigations in number, data, and space
Publisher: Dale Seymour Publications
Published: 1998
Place of publication: Menlo Park, Calif
Language: eng
Number of pages: 202
ISBN-13: 9781572326576
Subjects: Mathematics; Study and teaching (Primary); Arithmetic; Study and teaching (Elementary)
Notes: "Developed at TERC, Cambridge, Massachusetts."

"Grade 2.  Also appropriate for Grade 3."