This Problem Set is a part of the Lesson 7, Unit 2, Grade 7. Students locate the sum 𝑝 + 𝑞 of two rational numbers on a number line by placing the tail of the arrow for 𝑞 at 𝑝 and locating 𝑝 + 𝑞 at the head of the arrow. Students focus on how to represent the answer using both an equation and a number line diagram.