Help your students increase addition facts fluency and meet Common Core Standards with these comprehensive, printer-friendly math drills. The 76 drills include four drills for each number as well as each number mixed with all preceding numbers (..., 6, 0 thru 6, 7, 0 thru 7, ...). Each drill includes 25 questions and can be used as a timed test or practice. Grading is easy with the included concise answer keys for each set of drills and the class progress sheet. Your suggestions for improveme