①235-(456+304)÷4
②600÷[(160-76)÷7]
③95+560÷14×28
④640÷[8×(3.7+4.3)]
①856-315÷9+102
②3.27+6.4+2.73+4.6
③3200÷25÷4
④32×125×25
⑤1289-(89+1080-50)
⑥96×45-34×96-96
⑦4.8-3.62-0.38+0.2
①73.7-7.3-12.7
②15.7+0.58+0.42+2.3
③25×32×125
④36×68+64×68
⑤(425-373)×18÷39
⑥860÷[(170+260)÷10]
①26×15﹣200
②8×4×12.5×0.25
③×+
④12÷[()×]
①
②36×()
③
④
⑤3.24×0.76+3.24×0.24
⑥