11-1=12? - Section 2: Opening Discussion

 
  11-1=12?
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Cookie Mysteries

Unit 11: Missing Parts: Unknowns in All Positions
Lesson 2 of 10

Objective: SWBAT explain their strategies for solving a missing whole subtraction story.

Big Idea: I use the element of mystery to get kids excited to figure out how many cookies I have to start with!

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