Combining and comparing
Subtitle: addition and subtration
By: Jan Mokros, Susan Jo Russell.
Contributors: Russell, Susan Jo.; TERC (Firm)
Series: Investigations in number, data and space
Publisher: D. Seymour Publications
Published: 1998
Place of publication: Menlo Park, Calif
Language: eng
Subjects: Addition.; Subtraction.
Notes: "Developed at TERC, Cambridge, Massachusetts."
"Grade 3, also appropriate for Grade 4."
Accompanied by: Investigations at home. 21 p.