This is an Excel spreadsheet that creates randomly generated Subtraction worksheets. 1) Select a range of subtrahends 7 to 7 and a range of differences 1 to 10, if you want to only practice 7s. 2) Select a range of subtrahends 1 to 10 and a range of differences 1 to 10, if you want to practice or test all of the basic subtraction facts.