This Power Point slide show contains all basic subtraction basic facts from 1-0 to 18-9, for a total of 92 facts. One fact is on each slide. The facts show on the screen for 3 seconds, after which time the answer appears. Students are encouraged to write the answer to each fact on a white board. When the answer appears, students can check their own work.
Transition times are editable. For a greater challenge you can reduce the amount of time a fact is shown before the answer appears.