This resource houses links to a variety of sample math tasks aligned to the Common Core standard. Sources may include but are not limited to: Illustrative Mathematics, PARCC, Khan Academy, and the Illinois State Board of Education.
Solve word problems that call for addition of three whole numbers whose sum is less than or equal to 20, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.
Farquer, Tim. "1.OA.2 Sample Tasks". OER Commons. Institute for the Study of Knowledge Management in Education, 12 Dec. 2012. Web. 21 Aug. 2019. <https://www.oercommons.org/authoring/1668-1-oa-2-sample-tasks>.
Farquer, T. (2012, December 12). 1.OA.2 Sample Tasks. OER Commons. Retrieved August 21, 2019, from https://www.oercommons.org/authoring/1668-1-oa-2-sample-tasks.