Posted on October 5, 2017 by admin Adding 20, Practice 1 20 + 74 83 + 20 20 + 62 38 + 20 20 + 47 76 + 20 20 + 24 75 + 20 20 + 55 74 + 20 Post navigationPrevious post: Adding 15, 25, …Next post: Question #1