1st Grade Addition Mental Math Sprints & Assessments | Facts Within 20 Build number fluency with these addition math sprints and fluency assessments. Students practice addition facts within 10 and 20 while strengthening mental math strategies, accuracy, and fact recall. Perfect for math centers, small groups, intervention, early finishers, warm-ups, pocket charts, math walls, and number line displays. 🛍️ What’s Included — 191 Pages | Printable PDF👉 +1 Addition Math Sprint Worksheets (Facts