Unit 2, Lesson 2# Use the associative and commutative properties to make ten with three addends.

EngageNY 60 min(s)

This lesson focuses on using the associative and commutative properties to add three addends without the context of story problems. Students practice associating the two addends that make ten and then adding the third addend. For example, they add 7 + 5 + 3 by adding 7 + 3 first and then adding the 5.