Posted on October 5, 2017 by admin Adding 10, 15, 20, 25, …, Practice 1 20 + 10 25 + 45 45 + 40 30 + 25 35 + 15 30 + 30 10 + 15 15 + 5 35 + 35 20 + 30
Posted on October 5, 2017 by admin Adding 10–19, Practice 1 18 + 12 16 + 12 16 + 19 11 + 14 17 + 15 19 + 16 15 + 14 15 + 10 19 + 18 11 + 13
