This Fluency Activity is a part of the Lesson 4, Unit 3, Grade 1. This fluency activity reviews the grade level standard of adding within 20. Partners start at 0. Partners take turns rolling a die and then saying a number sentence by adding the number rolled to the total. For example, Partner A rolls 6 and says, "0 + 6 = 6." Partner B rolls 3 and says, "6 + 3 = 9.")