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Standards/Math/North Dakota/2.OA.2

2.OA.2

2.OA Operations and Algebraic Thinking
2.OA.1
2.OA.2
2.OA.3
2.OA.4

Use mental strategies to fluently add and subtract within 20.

Khan Academy Resources
Add within 20Subtract within 20Subtract within 20 visuallyAdd & subtract within 20Add within 20 visuallyAdd and subtract within 20 word problemsSubtract within 20 using ten framesSubtract within 20 using a number lineAdding 7 + 6Addition and subtraction word problems: superheroesSubtract within 20 using place value blocksAdding 8 + 7Subtracting 14 - 6Adding within 20 using place value blocksAddition and subtraction word problems: gorillasAdding within 20 using ten frames
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