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This is a set of 25 numbered (and repeated unlabeled/un-numbered) task cards with 25 different 1st grade math problems, aligned to Common Core 1.OA.B.4 and various similar State standards. These problems require the student to answer various problems relating the fact that a subtraction problem is an unknown-addend problem as well. An answer key, as well as a blank answer sheet, are also provided.
These task cards are not labeled, but are aligned to Common Core 1.OA.B.4 and various State standards. If you would like these labeled as Common Core or various other State standards, I have these same task cards in these formats in other listings in my shop.
See this same item labeled as Common Core and other State standards:
Please let me know if you have any questions or suggestions - I'm always creating!