Subtraction Drill Worksheets - Math Worksheets 4 Kids The pdf worksheets encompass 4-minute to 14-minute drills on subtracting 0 to 5, 0 to 10, and 0 to 20 and 2-digit and 3-digit numbers - with and without regrouping. They are sorted according to the number of digits for children of kindergarten through grade 5 to elevate subtraction learning step by step. Timed drills on both horizontal and ...