①156+28+72+44
②15.28﹣3.9﹣6.1
③12.5×8÷12.5×8
④÷[-(-)]
25%×+× ×60%÷ 0.25++75%+87.5%
+×- ×101-0.6 (-20%)÷80%
①36×()
②1.3×37.5%+2.7×
③ [()]
④13÷()×