Fill-the-Missing-Addend

This printable math worksheet is designed to help students in Grades K-1 deepen their understanding of addition relationships while strengthening fluency with +2 and +3 facts. Instead of solving for the sum, students determine the missing addend, encouraging flexible thinking and a stronger grasp of how numbers work together.

Learning Goals

• Identifying Missing Addends (Grades K-1)
  Practice finding the unknown number in addition equations involving +2 and +3.
• Understanding Number Relationships
  Reinforce the idea that addition is made of parts that combine to form a whole.
• Strengthening Fact Family Reasoning
  Help students recognize connections between related addition facts rather than relying on memorization alone.
• Reinforcing Fluency with +2 and +3 Facts
  Build confidence and accuracy by applying familiar facts in a new format.

Instructional Benefits

• Teacher-Created Resource
  Designed to align with early elementary math standards and conceptual learning goals.
• Concept-Focused Format
  Encourages reasoning and problem solving, not just computing sums.
• Assessment-Friendly Design
  Allows teachers to quickly see whether students truly understand addition structure.
• Flexible Classroom Use
  Ideal for guided practice, small groups, intervention, independent work, or skill checks.

This fill-the-missing-addend worksheet helps students develop number sense, logical reasoning, and addition fluency with +2 and +3 facts. By working with reversed equations, learners strengthen their understanding of how addition works-laying an important foundation for subtraction, algebraic thinking, and future math success.

This worksheet is part of our Addition Facts With 2 and 3 Worksheets collection.