①273-73-27
②99×38+38
③37+125+63+175
④32000÷125÷8
⑤125×32×25
⑥17×23-23×7
①57.6﹣18.15+32.4﹣11.85
②78×25+1764÷49
③2.5×32×12.5
④3.6×[(37.5+18.5)÷2.8]
⑤÷[(﹣)×]
⑥199×99+178+21