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Operations and Algebraic Thinking Add and subtract within 20. 6Understand the relationship between numbers and quantities; connect counting to cardinality.Add and subtract within 20, demonstrating fluency for addition and subtraction within 10. Use strategies such as counting on; making ten (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 = 14]; decomposing a number leading to a ten (e.g., 13 - 4 = 13 - 3 - 1 = 10 - 1 = 9]; using the relationship between addition and subtraction (e.g., knowing that 8 + 4 = 12, one knows 12 - 8 = 4]; and creating equivalent but easier or known sums (e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13).

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$- Adding Within 20 worksheet$

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Adding Within 20

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$- Adding Within 20 (horizontal) worksheet$

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Adding Within 20 (horizontal)

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Creating Tens

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$- Finding Equivalent Addition Problems with 10 worksheet$

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Finding Equivalent Addition Problems with 10

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- Finding Equivalent Addition Problems with 10 worksheet

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$- Add and Subtract (Within 20) worksheet$

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Add and Subtract (Within 20)

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- Add and Subtract (Within 20) worksheet

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$- Subtracting within 20 (horizontal) worksheet$

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Subtracting within 20 (horizontal)

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- Subtracting within 20 (horizontal) worksheet

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