Singapore Math's Primary Mathematics, Standards Edition Workbooks are consumable and should be used in conjunction with the corresponding textbooks; these Standard Edition workbooks are not compatible with other Singapore editions (e.g. U.S. 3rd Ed.). Containing independent student exercises, workbooks provide the practice essential to skill mastery; each chapter in the textbook has corresponding problems in the workbook while review exercises help students to consolidate concepts they've learned previously. A variety of exercises are presented in the concrete> pictorial>abstract approach, including decimals, The Four Operations of Decimals, and Congruent and Symmetric Figures. 163 pages, softcover. Grades 4-5. Primary Mathematics Standards Edition Textbook 4B. Answer keys are not included, but are found in the Primary Mathematics Standards Edition Home Instructor's Guide 4B.