If you were a minus sign
By: by Trisha Speed Shaskan ; illustrated by Francesca Carabelli.
Contributors: Carabelli, Francesca, ill.
Series: Math fun
Publisher: Picture Window Books
Published: 2009
Place of publication: Mankato, MN
Language: eng
ISBN-13: 9781404847873
Subjects: Mathematical notation -- Juvenile literature; Subtraction -- Juvenile literature
Genres: Juvenile literature.
Notes: Includes index.