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