①0.125× + ×
②1998×
③38.4×27+616×2.7
④282﹣282÷12﹣58.5
①0.53×2.5+
②25×0.032×12.5
③ [()×]
④6.83+17.9﹣0.83+32.1
①54×98
②(+﹣)×24
③4.86×[1÷(2.1﹣2.09)]
④8﹣