求教(数学六年级)~~~~~~~~~~~
(1997*0.3)/(1999*0.5)+(1.2/1999)=?(要写过程)
参考答案:(1997*0.3)/(1999*0.5)+(1.2/1999)
=(1997*0.3)/(1999*0.5)+(0.6/1999*0.5)
=[(1997+2)*0.3]/(1999*0.5)
=0.6
(1997*0.3)/(1999*0.5)+(1.2/1999)=?(要写过程)
参考答案:(1997*0.3)/(1999*0.5)+(1.2/1999)
=(1997*0.3)/(1999*0.5)+(0.6/1999*0.5)
=[(1997+2)*0.3]/(1999*0.5)
=0.6