①2.65×1.7+7.35×1.7
②36×( + )
③54.2- +4.8-1
④0.7÷[( - )×24]
①338﹣338÷26×12
②102.7×3.4+102.7×6.6
③
④×[+(﹣75%)]
①3.6﹣2.8+7.4﹣7.2
②1.25×1.6×25
③÷4
④÷[(﹣)×]