ADHD-Friendly Double Digit Addition & Subtraction WorksheetsSmash & Build Method BUNDLE! | Low-Stimulation Math Practice Proven method of teaching simple double digit addition and subtraction to high anxiety learners. Teaching method included! Part 1 - Focused on building confidence working with double digit numbers. Part 2 - Worksheets focused on low stress regrouping and borrowing! If your students or child feels overwhelmed by busy worksheets or struggle with memorizing math facts, this reso