This Application Problem is a part of the Lesson 16, Unit 4, Grade 1. Use the RDW process to solve one or more of the problems without using linking cubes. Emi had a linking cube train with 14 blue cubes and 2 red cubes. How many cubes were in her train? Emi made another train with 16 yellow cubes and some green cubes. The train was made of 19 linking cubes. How many green cubes did she use?