999又997\998除以1\499
问题描述:
999又997\998除以1\499
答
999又997\998除以1\499
=(999*998+997)/998/(1/499)
=(999*998+997)*499/998
=(999*998+997)/2
=(1000*998-998+997)/2
=997999/2;
答
(999又997/998)/(1/499)
=(999+997/998)*499
=999*499)+(997/998)*499
=498501+498.5
=498999.5