①4.05÷0.81+2.4
②4.85×8×1.25
③31.9×8-0.8×19
④
⑤
⑥
①216÷(18×6)
② × + ÷
③( - )× ×36
④125%×2.5×3.2
⑤4.67-(0.67+2.98)
⑥ ÷[2÷( - )]