This Fluency Activity is a part of the Lesson 5, Unit 8, Grade 2. This fluency activity reviews using place value understanding to rename units in preparation for subtraction with chips and the algorithm during Fluency Practice in Lessons 7 and 8. I'm going to give you a number in unit form. I want you to rename 1 of the hundreds for 10 tens and then tell me how many hundreds, tens, or ones.