This is a great practice worksheet to practice subtracting 2-digit numbers. There is space inside each shamrock for the students to use any strategy they would like and solve the problems. This sheet contains 9 problems, and can be used as seatwork during math centers, homework, morning work or an assessment. This would be a great follow-up to my 5 problem shamrock subtraction worksheet that I created to guide you through small group instruction to teach subtraction strategies. Some problems involve regrouping, and some do not. Also check out my other shamrock addition, subtraction, multiplication and division practice worksheets.