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Leffingwell, Richard.

Adding and counting on / Richard Leffingwell. - Chicago : Heinemann Library, c2006. - 24 p. : col. ill. ; 23 cm. - Basic math Heinemann read and learn . - Leffingwell, Richard. Basic math. .

Includes index.

1403481555 (library binding-hardcover) 1403481601 (pbk.)

2006005175


Addition.
Counting.

QA115 / .L448 2006

513.2/11