Question

31 1/9:3 1/9-10,1*(1,35:1 2/7+2,15)

Answer 1

31 1/9:3 1/9=280/9*9/28=10
1.35:1 2/7=27/20*7/9=21/20=1.05
1.05+2.15=3.2
10.1*3.2=32.32
10-32.32=-22.32