This Instructional Activity is a part of the Lesson 1, Unit 6, Grade 6. In this activity, students draw tape diagrams to match given equations. Then, they reason about the unknown value that makes the equation true, a process also known as solving the equation. Students should not be shown strategies to solve but rather should reason with equations or diagrams in ways that make sense to them. As they work, monitor for students who use the diagrams to find unknown quantities and for those who use the equations.