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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

- adding-within-20 worksheet

Adding Within 20

Each worksheet has 20 problems adding within 20.

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- adding-within-20-horizontal worksheet

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Adding Within 20 (horizontal)

Each worksheet has 20 problems finding the sum of numbers within 20.

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- creating-tens worksheet

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Creating Tens

Each worksheet contains 7 problems breaking an addition problem into an adding with ten problem.

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- finding-equivalent-addition-problems-with-10 worksheet

- finding-equivalent-addition-problems-with-10 worksheet

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Finding Equivalent Addition Problems with 10

Each worksheet has 20 problems

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- add-and-subtract-within-20 worksheet

- add-and-subtract-within-20 worksheet

- add-and-subtract-within-20 worksheet

- add-and-subtract-within-20 worksheet

Add and Subtract (Within 20)

Each worksheet has 50 problems adding and subtracting below 20.

Load up one problem at a time! Ideal for projectors, tablets and computers.

Load up one problem at a time! Ideal for projectors, tablets and computers.

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- subtracting-within-20-horizontal worksheet

- subtracting-within-20-horizontal worksheet

- subtracting-within-20-horizontal worksheet

- subtracting-within-20-horizontal worksheet

Subtracting within 20 (horizontal)

Each worksheet has 20 problems subtracting within 20.

Load up one problem at a time! Ideal for projectors, tablets and computers.

Load up one problem at a time! Ideal for projectors, tablets and computers.

Create a distance learning assignment.

Distance Learning

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