This workbook contains 100 subtraction facts worksheets. Each worksheet has 35 exercises. The first 20 worksheets focus on a single number's subtraction facts, which is good for beginning students. Worksheets 21-30 have the facts 1-10 mixed. Worksheets 31-50 have the facts 2-10 mixed (the 0's and 1's are now removed). Worksheets 51-1...