Help 2nd graders master missing number subtraction with hands-on cards, number lines, and exit tickets! Perfect for math centers, early finishers, and CCSS-aligned lessons. Unlock subtraction mastery with missing number magic!This Missing Number Subtraction Cards resource is designed to help your 2nd graders crack the code of subtraction equations by finding the missing subtrahend — like solving puzzles in math! Using Common Core strategies (1.OA.D.8), students will confidently work through pro