Math Mammoth Grade 7-B Worktext (2025 edition)

Math Mammoth Grade 7-B worktext is the second student worktext of the Math Mammoth Grade 7 curriculum, and covers the second half of 7th grade math. This is the 2025 edition. Part B starts out with a study of ratios and proportions (chapter 6). Students study unit rates, proportions, proportional relationships, scale drawings, and floor plans. The next chapter provides thorough lessons on the concept of percent. Students learn to solve a wide variety of problems involving percentages, including percentage of change and simple interest problems. Geometry is our focus in chapter 8. Students draw geometric figures with given conditions (e.g. a triangle with 60° and 50° angles and a 6-cm side), and they also learn some basic geometric constructions. The other themes of this chapter are various angle relationships, area and the perimeter of a circle, conversions between units of area and of volume, surface area, volume, and cross-sections when solids are sliced with a plane. Chapter 9 is an introduction to probability. Besides learning the basic idea behind probability as the ratio of favorable events to all possible events, students compare experimental probabilities to theoretical ones in probability simulations and even design some on their own. Lastly, in chapter 10, the curriculum covers statistical concepts. The major areas of study are random sampling and learning to compare two populations using some basic statistical measures and graphs. Part A student worktext, a book containing chapter tests and cumulative reviews, and the answer key book are available separately at Lulu.