This is a set of pages for those who want student practice and review in double digit addition. This method of partial sums addition, which is simple, but effective, has more students grasping the place value focus. You deconstruct it, or break it apart horizontally, in tens and then ones (or hundreds, tens, ones) then vertically add each place before horizontally adding those place value sums. Take a look. Included are five practice pages - the first one with an answer sheet to show how to t