1) 5 5/12-2 7/15= 2) 2 5/18+ 1 3/4= 3) 1 3/5*15-2 1/8: 2 5/6= распишите !

1) 5 5/12 - 2 7/15 = 5 25/60 - 2 28/60 = 4 85/60 - 2 28/60 = 2 57/60
2) 2 5/18 + 1 3/4 = 2 10/36 + 1 27/36 = 3 37/36 = 4 1/36
3) 1 3/5 * 15 - 2 1/8 : 2 5/6 = 8/5 * 15 - 17/8 : 17/6 = 120/5 - 17/8 * 6/17 = 24 - 3/4 = 24 - 0,75 = 23,25