Ages 6-8. Similar in concept and format to her earlier math books Mission: Addition (1997) and Fraction Action (1994), this picture book features Miss Prime and her class as they learn about subtraction in seven short chapters centering around the school fair. In one chapter, the class watches a puppet play in which cookies disappear from Little Red Riding Hood's basket. Another chapter involves price slashing at two competing refreshment stands. Episodic and mildly amusing, the stories offer a variety of situations to reinforce learning about subtraction in students who understand the concept and have already had some practice. Leedy's cartoonlike drawings and chalk-box colors give the pages an inviting look. This isn't likely to persuade disbelievers that math is fun, but it will entertain children who enjoy the subject. Carolyn PhelanCopyright © American Library Association. All rights reserved