First tab, "addition tables", provides you with the addition tables and the answers from 1 - 12. Second tab, "no answers", provides you with the addition tables without answers from 1 - 12. Third tab, "one random", provides you with a addition table of your choosing plus a random numbers from 1 - 12. Fourth tab, "all random", provides you with all the addition tables 1 - 12 plus a random number from 1 - 12. Both the third and fourth worksheet can generate a LIMITLESS amount of worksheets for your enjoyment. The worksheets can be use for testing or for practice. To generate worksheets simply go to a blank cell and push the delete key.