9.99乘以66.6+111乘以0.333乘以9的简便运算

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9.99乘以66.6+111乘以0.333乘以9的简便运算
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9.99乘以66.6+111乘以0.333乘以9的简便运算
9.99乘以66.6+111乘以0.333乘以9的简便运算

9.99乘以66.6+111乘以0.333乘以9的简便运算

9.99乘以66.6+111乘以0.333乘以9
=9.99*66.6+111*0.333*9
=9.99*66.6+111*0.333*(0.09*100)
=9.99*66.6+111*0.09*0.333*100
=9.99*66.6+9.99*33.3
=9.99*(66.6+33.3)
=(10-0.01)(100-0.1)
=10...

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9.99乘以66.6+111乘以0.333乘以9
=9.99*66.6+111*0.333*9
=9.99*66.6+111*0.333*(0.09*100)
=9.99*66.6+111*0.09*0.333*100
=9.99*66.6+9.99*33.3
=9.99*(66.6+33.3)
=(10-0.01)(100-0.1)
=1000-1-1+0.001
=998.001

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