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Discovering the Unknown

Unit 11: Subtraction Strategies
Lesson 5 of 7

Objective: SWBAT determine the unknown whole number in a subtraction problem.

Big Idea: My First Graders have been working hard to learn multiple strategies to solve subtraction. This lesson will have them incorporate all those skills to solve for the unknown.

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Standards:
Subject(s):
Math, Number Sense and Operations, First Grade, unknown whole number, Operations
  35 minutes
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