The range of numbers used for each worksheet may be individually varied to generate different sets of subtraction worksheets. (math-aids.com)
A student who has memorized all of the single digit subtraction problems should be able to work out the 100 problems correctly in 5 minutes, 60 problems in 3 minutes, or 20 problems in 1 minute. (math-aids.com)
There are 3 pages of subtraction fact practice with answer keys for each fact (subtracting with 0 - 10) and flash cards included. (tes.com)