Sea sums /
Hulme, Joy N.
Sea sums / Joy N. Hulme ; illustrated by Carol Schwartz. - New York : Scholastic, c2001. - 31 p. : col. ill. ; 22 x 26 cm.
Addition.
Subtraction.
Sea sums / Joy N. Hulme ; illustrated by Carol Schwartz. - New York : Scholastic, c2001. - 31 p. : col. ill. ; 22 x 26 cm.
Addition.
Subtraction.