A set of 6 pages of simple addition math drills, including answers on separate pages. These pages alternate stacked addition and side-by-side addition, ensuring students are exposed to both. Ranges increase from 2-35, 36-65, and 66-99; allowing students to incrementally increase their skills in addition. Extremely useful for a morning warm up before class or as a review/refresher for more advanced students - estimated time to complete: Gr1 - 15 minutes, Gr2 - 10 minutes, Gr3 - 5 minutes.