2 5/6*1 7/9+5/6-3/9÷4/5
1)25/6*17/9=425/54=7 47/54 2)3/9:4/5=5/12 3)425/54+5/6=425/54+45/54=470/54=8 16/27 4)8 16/27-5/12=940/108-45/108=895/108=8 31/108