preshayjordan preshayjordan 22-04-2017 Mathematics contestada (1) [12 4/7 + 2 3/14] - 2 6/14 (2) [5 1/2 + 2 3/4] - 3 1/2 (3) 10 5/16 -[5 1/4 + 2 9/16] (4) 6/9 + 5/18 + 1 3/6 please,help!