333*6.66+999*7.78怎么巧算
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333*6.66+999*7.78怎么巧算
333*6.66+999*7.78怎么巧算
333*6.66+999*7.78怎么巧算
333*6.66+999*7.78
=333*3*2.22+999*7.78
=999*2.22+999*7.78
=999*(2.22+7.78)
=999*10
=9990
333*6.66+999*7.78
=999×2.22+999×7.78
=999×(2.22+7.78)
=999×10
=9990
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333*6.66+999*7.78
=333×3×2.22+999×7.78
=999×(2.22+7.78)
=999×10
=9990
333*6.66+999*7.78
=333x3x2.22+999x7.78
=999x(2.22+7.78)
=999x10
=9990
333*6.66+999*7.78
=333*3*2.22+999*7.78
=999*(2.22+7.78)
=999*10
=9990
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