Unit 1, Lesson 21

Visualize and solve doubles and doubles plus 1 with 5-group cards.

EngageNY 60 min(s)
In this lesson, students add doubles (1 + 1, 2 + 2, 3 + 3, etc.) and doubles plus 1 using fingers and 5-group cards. For example, they add 3 + 3 to get 6, and realize that adding 3 + 4 is just adding 3 + 3, and then 1 more to get 7.

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