Get ready to teach, review, or assess adding two 4 digit numbers with regrouping---leprechaun style. Start off with a whole group activity using the problem/answer cards. Then have students do the 20 cards in a center setting. There is a student answer sheet and answer key included. Follow up with 6 worksheets--answer keys provided! Laminate the activity/center pieces and you can use them over and over again, year after year.
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