Basic Horizontal Addition Answer Key

This worksheet contains thirty horizontal single-digit addition problems, helping students strengthen fluency in a less-scaffolded format. Horizontal equations encourage mental math strategies and flexible thinking. Students develop confidence as they compute accurate sums quickly without vertical alignment. The problems cover a broad range of facts to reinforce recall and number pattern recognition. This worksheet is suitable for warm-ups, quick checks, or repeated fluency practice.

Curriculum Matched Skills

Mathematics – Addition Within 20

Mathematics – Mental Math Reasoning

Mathematics – Number Patterns and Relationships

Mathematics – Fast Computation Skills

This worksheet is part of our Addition Mad Minute Worksheets collection.