①8.2+(9.6-8.2)
②36×(600-586)
③906÷3×4
①186÷(3×2)
②63×3÷9
③300-360÷4
①15.28﹣3.6﹣3.4
②()×7.2
③
④7.5÷[(6.8﹣4.3)×0.12]