Fall Theme 3 Digit Addition and Subtraction: This resource was designed to help students comprehend the skill of adding and subtracting three-digit numbers, with and without regrouping. Using the six included anchor charts (full-color teacher anchor charts, black and white, and 1/2 sized for student journals), teachers can explain each step of the regrouping process in a systematic order. Place value columns are labeled with an H, T, and 0 for Hundreds, Tens, and Ones. Easy to use and easy to un