简算:7142.85/3.7/2.7/1.7*0.7

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简算:7142.85/3.7/2.7/1.7*0.7简算:7142.85/3.7/2.7/1.7*0.7简算:7142.85/3.7/2.7/1.7*0.7是乘以1.7吧?否则都除不尽了法一:把714

简算:7142.85/3.7/2.7/1.7*0.7
简算:7142.85/3.7/2.7/1.7*0.7

简算:7142.85/3.7/2.7/1.7*0.7
是乘以1.7吧?否则都除不尽了
法一:把7142.85分解质因数即得7142.85=3*3*3*5*11*13*37*0.01=5*11*13*27*37*0.01
7142.85÷3.7÷2.7×1.7×0.7
=5×11×13×27×37×0.01÷3.7÷2.7×1.7×0.7
=5×11×13×27×37÷37÷27×1.7×0.7
=5×11×13×1.7×0.7
=850.85 
法二:
7142.85÷3.7÷2.7×1.7×0.7
=7142.85÷37÷27×17×7 
=7142.85×7÷999×17 
=49999.95÷999×17 
=50.05×17 
=850.85