Unit 3, Lesson 10
Using Equations to Solve Problems
Accelerated 7
Preparation
Lesson Narrative
This lesson brings together the skills and concepts that have been studied in the unit so far. Students solve problems that can be represented by equations of the form and . A bit of scaffolding is offered in the first activity to reactivate students’ understanding of tape diagrams, but after that, no scaffolding is offered so that students can make sense of problems and choose representations on their own (MP1). The last activity is optional because no new concepts are covered. It does, however, offer additional practice writing and solving equations of the form and to solve real-world problems.
- Interpret and coordinate tape diagrams, equations, and verbal descriptions for situations involving signed numbers.
- Solve an equation of the form $px+q=r$ or $p(x+q)=r$ to determine an unknown quantity in a situation, and present the solution method (orally, in writing, and through other representations).
- Write an equation of the form $px+q=r$ or $p(x+q)=r$ to represent a situation involving signed numbers.
Let’s use tape diagrams, equations, and reasoning to solve problems.
Required Materials
Required Preparation
Decide if students will conduct group presentations or a Gallery Walk for the last activity. If so, prepare tools for creating a visual display and about 3 sticky notes per student. If not, these materials are not necessary.