Fourth graders and beyond need a firm foundation in basic Math facts, which means that these facts have become their "sight vocabulary" just as the Dolch Words are in Reading. Included in this offering are 34 speed practices for subtraction. Each of these practices includes 20 problems which focus on several facts each, as well as several review facts from earlier speed practices. Each practice is written on a 1/2 sheet of paper. There are no answer keys for the Speedy Fact Trials.