The purpose of this task is to help students develop flexible strategies for adding and subtracting within 20. Students will pick 5 number cards from pre-made cards labeled 1-10. Then, another student will pick a "target number" between 10-20. Students must add and/or subtract 2 or more of the number cards to arrive at the "target" number.

Concepts

addition, fact families, subtraction

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Additional Tags

2.oa.b.2, cc by-nc-sa 4.0, computational fluency, creative commons, creative commons attribution-noncommercial-sharealike 4.0, illustrative mathematics

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Classroom Considerations

• Knovation Readability Score: 2 (1 low difficulty, 5 high difficulty)
• The intended use for this resource is Instructional|practice