3 digit Math Worksheets Bundle Acticity your students will love — clean, cute, and ready to print! These 3 digit addition, Subtraction, and Mixed are perfect for building fluency and confidence in 2nd and 3rd grade math. Each worksheet includes carefully selected three-digit addition problems designed to engage and challenge learners at different skill levels. Students practice both addition with regrouping and addition without regrouping, allowing for built-in differentiation without extra pla