Posted on October 5, 2017 by admin Adding Tens, Practice 2 30 + 20 40 + 70 40 + 50 60 + 50 70 + 20 10 + 30 30 + 60 60 + 10 70 + 20 20 + 30 Post navigationPrevious post: Adding 20, Practice 3Next post: Question #1