1.OA.5.Relate+counting+to+addition+and+subtraction

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Operations and Algebraic Thinking 1.OA 5.Relate counting to addition and subtraction (e.g., by counting on 2 to add 2). *Use of the number line and hundreds board ||
 * Add and subtract within 20. **
 * TM 1.2.2, 1.2.3, 1.2.4, 1.9.6, 1.9.7, 1.9.8

List of resources: http://www.k-5mathteachingresources.com/1st-grade-number-activities.html