This Fluency Activity is a part of the Lesson 21, Unit 5, Grade 3. This activity supports fluency with division. Steps 1 and 2 are timed for two minutes. Step 3 is timed for 1 minute of testing for each partner. Step 4 is timed for two minutes. Students self-select a number and write a set of multiples up to that number's multiple of 10 vertically down the left-hand side of the page.