This Fluency Activity is a part of the Lesson 5, Unit 2, Grade 1. This fluency activity provides maintenance with partners to ten while applying the commutative property. Students put 5-group cards facedown and write 10 on their boards. Each partner takes a 5-group card and then draws a number bond without bubbles using the selected card as one part. Students write two addition sentences for the number bond and check each other's work.