Addition Facts Assessment | Sums 11 to 20 | Printable Paper-Based RTI ToolBuild fluency and monitor progress with this Addition Facts Printable Assessment (sums 11 to 20)—a no-prep, paper-based tool designed to assess and support mastery of more advanced addition facts. Perfect for grades 1–3, special education, and math intervention, this assessment makes it easy to document growth, target instruction, and meet data collection needs. With 165 unique addition problems, this tool helps identify