SmartUp Learning

These Missing Addend Worksheets (Domino, Part–Part–Whole, and Addition Missing Numbers) are designed to help early elementary students develop a strong understanding of basic addition and number relationships. The activities focus on helping learners recognize that addition problems can have a missing number and that the total can be used to determine the unknown part. Across the 8 worksheets, students are asked to identify and complete the missing addend in simple addition equations. Each wo