The shark swimathon /

As members of a swim team do laps to qualify for swim camp, readers can practice subtracting two-digit numbers to see how many laps are left to go.

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Bibliographic Details
Main Author: Murphy, Stuart J., 1942-
Other Authors: Cravath, Lynne Woodcock (Illustrator)
Format: Book
Language:English
Published: New York : HarperCollins, c2001.
Edition:1st ed.
Series:MathStart
Subjects:

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