2÷(1 1/5-2.2)+1/10÷(2.8-3/8)

1) 1 1/5 - 2,2 = 1 1/5 - 2 1/5 = - 1 2) 2 : - 1 = - 2 3) 2,8 - 3/8 = 2 4/5 - 3/8 = 2 32/40 - 15/40 = 2 17/40 4) 1/10 : 2 17/40 = 1/10 : 97/40 = 4/975) - 2 + 4/97 = - 1 97/97 + 4/97 = - 1 93/97