Assessing Ability to Find Combinations of 10

Unit 11: The Number 10 and the Addition and Subtraction Concept
Lesson 13 of 17

Objective: SWBAT find 2-addend combinations of 10 (at least five combinations). SWBAT add 2 or more single digit numbers. SWBAT create 2-addend combinations for 20 (at least three combinations).

Big Idea: What's Your Number? No, we are not talking about your Sleep Number but rather how many combinations of ten your students can each find as they solve an assessment task.

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Math, 1st Grade, fact fluency, Combinations of 10, Rote Counting to 120, Combinations of 20
  70 minutes
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