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This Grade 1 addition worksheet provides 26 problems to build fluency with sums to 20. Includes answer key. Aligned to CCSS.MATH.CONTENT.1.OA.C.6. Get your.
Master grouping in twos with this 5-page math worksheet. Includes 20 tasks, visual aids, and an answer key. Aligned to CCSS.MATH.CONTENT.2.OA.C.3. Download now.