Math Mammoth Grade 5-B Worktext is the student worktext for second half of 5th grade mathematics studies. This book is the full-color version. Fifth grade focuses on fractions and decimals, in particular. In part 5-A, students have studied the four operations with whole numbers, large numbers, problem solving, and decimal arithmetic. In this part, 5-B, we study common statistical graphs, fraction arithmetic, and geometry. This book starts with chapter 5, where we study graphing in a coordinate grid, line and bar graphs, and average and mode. Today's world has become increasingly complex with lots of data presented in the media, so our children need a good grasp of statistical graphs to be able to make sense of all of that information. Chapter 6 covers the addition and subtraction of fractions--another topic of focus for 5th grade, besides decimals. The most difficult topic of this chapter is adding and subtracting unlike fractions, which is done by first converting them to equivalent fractions with a common denominator. In chapter 7, we study the multiplication and division of fractions (division only in special cases), relying first on visual models, and then proceeding to the abstract shortcuts. Chapter 8 takes us to geometry, starting with a review of angles and polygons. From there, students will learn to draw circles, to classify triangles and quadrilaterals, and the concept of volume in the context of right rectangular prisms (boxes).