Math Mammoth Grade 4-B Worktext is the student book for the latter half of grade 4, and part of the Math Mammoth Grade 4 complete curriculum. This book covers long division, factors, geometry, an introduction to fractions, and an introduction to decimals. The worktext contains both the necessary instruction and the problems & exercises (the 'text' & and the 'work', thus a "worktext"), and is fairly self-teaching. The curriculum meets and exceeds the Common Core standards. Please note this is a student worktext and does not contain the answers. The answer key book is available separatel