654-128-254
596+147-196
469+256+131
238+328+272
①45+5×9
②(34+29)÷9
③54-42÷6
④9×8+12
⑤(20+22)÷7
⑥72÷8+30
①64÷8÷4
②80﹣(21+19)
③67+(32﹣23)
④24÷3×4
⑤19﹣18÷3
⑥63÷(44﹣37)
①0.53×2.5+
②25×0.032×12.5
③ [()×]
④6.83+17.9﹣0.83+32.1
①15.28﹣3.6﹣3.4
②()×7.2
③
④7.5÷[(6.8﹣4.3)×0.12]