This Application Problem is a part of the Lesson 23, Unit 6, Grade 1. Peter has 8 more green crayons than yellow crayons. Peter has 10 green crayons. How many yellow crayons does Peter have? Today's problem is a compare with smaller unknown where the problem suggests the wrong operation. Students are expected to have worked with these problems in Grade 1, but mastery is not expected until the end of Grade 2.