2.OA.2) Fluently add and subtract within 20 using mental strategies.2 By end of
Grade 2, know from memory all sums of two one-digit numbers.
Adding and Subtracting Number Drills
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Number
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Operation
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Interactivity Type
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2
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Addition
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Subtraction
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3
|
Addition
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|
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Subtraction
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4
|
Addition
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|
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Subtraction
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5
|
Addition
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|
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Subtraction
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6
|
Addition
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|
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Subtraction
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7
|
Addition
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|
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Subtraction
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8
|
Addition
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|
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Subtraction
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9
|
Addition
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|
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Subtraction
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10
|
Addition
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|
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Subtraction
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11
|
Addition
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|
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Subtraction
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12
|
Addition
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|
|
Subtraction
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1-12
|
Addition
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|
|
Subtraction
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