999×7.78+333×6.66怎样简算
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999×7.78+333×6.66怎样简算
![999×7.78+333×6.66怎样简算](/uploads/image/z/1402894-46-4.jpg?t=999%C3%977.78%2B333%C3%976.66%E6%80%8E%E6%A0%B7%E7%AE%80%E7%AE%97)
提出来一个333 再答: 999*7.78+333*6.66
=999*7.78+333*3*2.22
=999*7.78+999*2.22
=999*(7.78+2.22)
=999*10
=9990
=999*7.78+333*3*2.22
=999*7.78+999*2.22
=999*(7.78+2.22)
=999*10
=9990