1.NR.2.2
Use pictures, drawings, and equations to develop strategies for addition and subtraction within 20 by exploring strings of related problems.
Khan Academy ResourcesAdd within 20Subtract within 20Subtract within 20 visuallyAdd & subtract within 20Add within 20 visuallyAdd and subtract within 20 word problemsAddition and subtraction word problems: superheroesAdding within 20 using place value blocksAddition and subtraction word problems: gorillasAdding within 20 using ten frames

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