①73×17-7×73
②543-128-272
③72÷[960÷(245-165)]
④
⑤76×(576÷12+27)
⑥4700÷25÷4
①735+636÷12×4
②230-253÷(54-31)
③6×[(392+598)÷45]
④146+1087+654+113
⑤8400÷4÷25
⑥124×101-124
① ×[0.75﹣( ﹣25%)]÷1.25
②6.37×1.25﹣1 +4.63×125%
③7.09× +0.225×6﹣60%×0.64
④ ×3+ ×25+ ×
⑤
⑥