Basic Addition Facts Answer Key

This worksheet provides students with a wide set of one-digit addition problems designed to build fluency and confidence with mixed math facts. Each item includes two addends, and students write the total in the blank box beneath each equation. The consistent structure allows learners to focus on speed, accuracy, and recognition of common addition patterns. By completing all thirty problems, students reinforce mental math strategies such as counting on, making tens, and recognizing doubles. This activity also supports smooth transition into more complex multi-step problems by strengthening foundational number sense.

Curriculum Matched Skills

Mathematics – Operations and Algebraic Thinking: Add within 20

Mathematics – Fluency with Mixed Addition Facts

Mathematics – Mental Math and Number Sense

Mathematics – Applying Addition Strategies

This worksheet is part of our Mixed Addition Facts Worksheets collection.