负九分之十减六点六四等于几

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负九分之十减六点六四等于几

负九分之十减六点六四等于几
负九分之十减六点六四等于几

负九分之十减六点六四等于几
-10/9-6.64
=-1-1/9-6-16/25
=-7-(1/9+16/25)
=-7-169/225
=-7又169/225

-10/9-6.64=-1000/900-664*9/900=-6976/900=7.7511111

-10/9-6.64
=-1000/900-5976/900
=-6976/900
=1744/225
=7又169/225