Multi-Digit Addition Worksheets – 2-, 3-, and 4-Digit Problems (3,650 Exercises) These worksheets help students practice 2-, 3-, and 4-digit addition, with and without regrouping. Designed for Grades 2–4, they provide structured practice to build fluency, accuracy, and confidence in multi-digit addition. With a total of 3,650 exercises, students get plenty of opportunities to strengthen their addition skills: 2-digit addition: 28 exercises per page 3-digit addition: 24 exercises per page 4-digi