Looking for a fun, brain-boosting way to review math fact fluency? These addition and subtraction games within 20 are the perfect way to reinforce fluency while challenging your students to think critically. Instead of solving traditional math problems, students must find the errors in the equations and fix them—perfect for small groups, early finishers, math centers, or whole-class review! This math activity reinforces addition and subtraction facts within 20 and promotes deeper thinking b