Primary Mathematics Extra Practice 2(Common Core Edition) is a supplementary book following the topical arrangement in the Primary Mathematics (Common Core Edition) Textbooks and Workbooks. The level of difficulty, as well as the style of the problems presented is similar to the exercises in the textbooks and workbooks. The short and topic-specific exercises enable instructors to assign work only in those topics in which the student needs more practice. Softcover. 208 pages.