①480+828÷18-218
②3160-20×(280-135)
③684÷(135-78)×75
④60×[(1136-148)÷38]
18.2﹣4.66﹣5.34
83×98
125×18×16
12.25+36+7.75
①15.28﹣3.6﹣3.4
②()×7.2
③
④7.5÷[(6.8﹣4.3)×0.12]