( + )× +
( ﹣ + )÷
5× +14÷4﹣19×0.25
5.5×17.3+2.7×5.5
①6.4×2.5×1.25
②8.5×98%
③÷4+×
④×
①54×98
②(+﹣)×24
③4.86×[1÷(2.1﹣2.09)]
④8﹣