How many pencils are in the cup?

This Application Problem is a part of the Lesson 23, Unit 4, Grade 1. Kim picks up 10 loose pencils and puts them in a cup. Ben has 1 package of 10 pencils that he adds to the cup. How many pencils are now in the cup? Use the RDW process to solve the problem. This problem bridges the objectives from Lesson 19 through to today's lesson.