Math Mammoth Grade 5-B Worktext is the second student book in Math Mammoth grade 5 curriculum, meant for the latter half of 5th grade. This is the 2023 edition.The main areas of study in Math Mammoth Grade 5-B worktext are: decimal arithmetic fraction arithmetic (all operations with fractions) geometry: review of angles, area, and perimeter; drawing circles; classifying triangles & quadrilaterals; volume of rectangular prismsChapter 6 continues our study of decimals. The focus is on multiplying decimals by decimals, dividing decimals by decimals, and conversions between measuring units.Chapter 7 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 8, we study the multiplication and division of fractions from various angles.Chapter 9 takes us to geometry, starting with a review of angles and polygons. From there, students will learn to classify triangles and quadrilaterals, and will study the concept of volume in the context of right rectangular prisms (boxes).Features Math Mammoth focuses on conceptual understanding. It explains the "WHY", so your children can understand the math, not just learn "HOW" to do it. The curriculum is mastery-oriented. This means it concentrates fairly long on a topic, delving into its various aspects. This promotes conceptual understanding, as opposed to spiral curricula that often tend to jump from topic to topic too much. Very little teacher preparation is required. The curriculum has no separate teacher's manual nor is it scripted. The introduction to each chapter has some notes for the teacher concerning the material in the chapter. All the instruction is written directly to the student in the worktext, and there also exist accompanying videos where you can see Maria herself teach the material.This is the full-color version of the worktext. Please note that it does not include the answers; they are sold as a separate book.