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Subtraction action /
by Leedy, Loreen.
Publication:
New York : Holiday House, 2000
. 32 p. :
29 cm.
Date:2000
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Combining and comparing : addition and subtration/
by Mokros, Janice R.
Publication:
Menlo Park, Calif. : D. Seymour Publications, 1998
. 1 v. (various pagings) :
, "Developed at TERC, Cambridge, Massachusetts." | "Grade 3, also appropriate for Grade 4." | Accompanied by: Investigations at home. 21 p.
28 cm.
Date:1998
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