Steffora, Tracey.

Using subtraction at the park / Tracey Steffora. - Chicago, Ill. : Heinemann Library, c2011. - 24 p. : col. ill. ; 18 x 21 cm. - Math around us .

Includes bibliographical references and index.

ISBN: 9781432968465 (pbk.)

LCCN: 2010030769

Subjects--Topical Terms:
Subtraction.

LC Class. No.: QA115 / .S7776 2011

Dewey Class. No.: 513.2/12