Murphy, Stuart J.,1942-

Shark swimathon /by Stuart J. Murphy ; illustrated by Lynne Cravath.
New York :HarperCollins Publishers,c2001.

32, [1] p. :col. ill.

"Level 3, Subtracting two-digit numbers."

Includes bibliographical references (p. [33]).

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.

"Ages 7 up"--P. [2] of cover.

1.SubtractionDynamic Details
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