Posted on October 5, 2017 by admin Adding 10–19, Practice 3 15 + 13 15 + 19 12 + 12 19 + 13 16 + 11 17 + 13 15 + 10 12 + 15 17 + 16 11 + 18 Post navigationPrevious post: Adding 20, Practice 3Next post: Question #1