Timed Math Drills: Subtraction provides step-by-step practice in addition that starts with whole-page calculations using the same, single addend (1 thru 9), progresses to calculations using two different addends, and then to all-inclusive, mixed addends. The goal is to achieve mastery at the highest possible accuracy level in the lowest possible time. A chart is included on which each student's progress can be recorded. Award forms are included to validate students' achievements.