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Standards/Math/Mississippi/2.OA.2

2.OA.2

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

Fluently add and subtract within 20 using mental strategies. By end of Grade 2, know from memory all sums of two one-digit numbers.

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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