1.OA.A.1 Worksheets: Word Problems Within 20

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1.OA.A.1 (Operations and Algebraic Thinking): Solve addition and subtraction story problems within 20, including ones where the start or the change is unknown.

About this standard

First graders solve word problems within 20 that add to, take from, put together, take apart and compare, with the unknown in any position. Drawing the story or acting it out with objects comes before writing an equation with a box for the unknown. Practice adding stories with Addition Word Problems Within 20, take-away stories with Subtraction Word Problems Within 20 and how-many-more stories with Comparison Word Problems: How Many More?.

Worksheets for 1.OA.A.1

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