This Application Problem is a part of the Lesson 13, Unit 3, Grade 3. This problem comes after the Concept Development, so students have the opportunity to apply some of the strategies they learned in the context of problem solving. Michaela and Gilda read the same book. It takes Michaela about 8 minutes to read a chapter and Gilda about 10 minutes. There are 9 chapters in the book. How many fewer minutes does Michaela spend reading than Gilda?