Find the Missing Addend: Two-Digit Numbers (No Regrouping)

In this activity, students find the missing addend in two-digit addition equations like 45 + ? = 68 or ? + 32 = 79—all without regrouping. This skill strengthens number sense, reinforces the inverse relationship between addition and subtraction, and lays the groundwork for algebraic thinking. Perfect for Grade 2 learners mastering addition within 100!