Math Mammoth Grade 3-B Worktext is the student book for the latter half of grade 3, and part of the Math Mammoth Grade 3 complete curriculum. This book covers place value with 4-digit numbers, geometry, measuring, concept of division, and fractions. 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...