Learning combinations for ten (2 + 8, 3 + 7, etc.) is a critical foundational skill for computational fluency. The activities in this unit are designed to help students develop fluency with combinations for ten.
• Quick Flash cards with ten-frame representation for developing benchmarks of 5 and 10
• Capture 4 game for making combinations for 10
• Go Fish card game that can be differentiated to practice making combinations for the numbers from 5 to 10
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Common Core Alignment
K.OA.3—Decompose numbers less than or equal to 10 into pairs in more than one way e.g., by using objects or drawings, and record each decomposition by a drawing or equation (e.g., 5 = 2 + 3 and 5 = 4 + 1)
K.OA.4—For any number from 1 to 9, find the number that makes 10 when added to the given number, e.g., by using objects or drawings, and record the answer with a drawing or equation.
K.OA.5—Fluently add and subtract within 5.
1.OA.6—Add and subtract within 20, demonstrating fluency for addition and subtraction within 10.
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