666*7+58*111简便算法

求解

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666*7+58*111=111*6*7+58*111=111（42+58）=11100

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666*7+58*111
=6*111*7+58*111
=42*111+58*111
=(42+58)*111
=100*111
=11100

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666*7+58*111
=111*6*7+58*111
=111*42+58*111
=111*(42+58)
=111*100
=11100

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