49.5x10又5分之3-(50-2分之1)x0.6= 40.2x8.1x5分之4除以(0.8x81x20.1)= (1
49.5x10又5分之3-(50-2分之1)x0.6= 40.2x8.1x5分之4除以(0.8x81x20.1)= (1999x0.5)分之(1997x0.3)+(1999
49.5x10又5分之3-(50-2分之1)x0.6=
40.2x8.1x5分之4除以(0.8x81x20.1)=
(1999x0.5)分之(1997x0.3)+(1999分之1.2)=
要求简算!
答案是多少~~~~~
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