These three digit addition and subtraction worksheets have missing digits for students to figure out. This bundle includes addition and subtraction problems with and without regrouping. Students will use the relationship between addition and subtraction to solve for the missing or unknown digits. These worksheets are perfect for independent work, small groups, enrichment, or a whole class lesson! Great for 3rd, 4th, or 5th grade! This resource includes:20 Worksheets (5 each product)20 Answer Key