Welcome to Singapore Math--the leading math program in the world. This workbook features math practice and activities for fourth grade students based on the Singapore Math method. An introduction at the front of the book explains Singapore Math and its common problem types. Each unit has learning objects, which clearly define the skills to be learned in that section, and an answer key with step-by-step worked out solutions that help students see how to work the problems. This book is perfect for students familiar with Singapore Math and for those who just need extra math practice.