This Fluency Activity is a part of the Lesson 22, Unit 1, Grade 1. This activity addresses the core fluency objective for Grade 1 of adding and subtracting within 10. Show students 8 pennies. Have students close their eyes and listen. Drop some of the pennies in a can, one at a time. To prepare students for the upcoming subtraction lessons, instruct them to count back from 8 in their heads as they hear each penny drop.