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Unit Plan

Khan Academy: Find Missing Number (Add and Subtract Within 20)

Curated by ACT

Learn how to solve problems like "___ - 7 = 18" where you don't know one of the values in an addition or subtraction equation. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

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CCSS: Adaptable
Concepts
addition facts, subtraction facts
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Additional Tags
number facts, khan academy: practice: find missing number (add and subtract within 20)
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Classroom Considerations
  • Knovation Readability Score: 4 (1 low difficulty, 5 high difficulty)
  • The intended use for this resource is Instructional|practice