Posted on October 5, 2017 by admin Adding 10–19, Practice 4 17 + 13 19 + 11 11 + 14 14 + 19 18 + 18 19 + 14 16 + 18 18 + 11 14 + 13 17 + 19
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
