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1oa6 Worksheets

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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1oa6

Adding Within 20

1oa6 Worksheets - adding-within-20 worksheet 1oa6 Worksheets - adding-within-20 worksheet

Adding Within 20 (horizontal)

1oa6 Worksheets - adding-within-20-horizontal worksheet 1oa6 Worksheets - adding-within-20-horizontal worksheet

Creating Tens

1oa6 Worksheets - creating-tens worksheet 1oa6 Worksheets - creating-tens worksheet

Finding Equivalent Addition Problems with 10

1oa6 Worksheets - finding-equivalent-addition-problems-with-10 worksheet 1oa6 Worksheets - finding-equivalent-addition-problems-with-10 worksheet

Add and Subtract (Within 20)

1oa6 Worksheets - add-and-subtract-within-20 worksheet 1oa6 Worksheets - add-and-subtract-within-20 worksheet

Subtracting within 20 (horizontal)

1oa6 Worksheets - subtracting-within-20-horizontal worksheet 1oa6 Worksheets - subtracting-within-20-horizontal worksheet
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