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Wilson Williams's mother and father try to help him with multiplication, but Wilson doesn't appreciate doing practice math tests on a play date. Fortunately, the class hamster is a comfort. Wilson is sure with his own little animal cuddling beside him, he could learn anything. But his mother doesn't like pets. Surprisingly, Wilson's younger brother, Kipper, comes to his rescue. Illustrations.

7 X 9 = Trouble! 2010, Farrar Straus Giroux, New York

ISBN-13: 9780374464523

Trade paperback

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7 x 9 = Trouble! 2004, Turtleback Books

ISBN-13: 9781417624638

Turtleback School & Library edition

Hardcover

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7 X 9 = Trouble! 2002, Farrar Straus Giroux, New York, NY

ISBN-13: 9780374367466

Hardcover

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