666*333+778*999 简便运算

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666*333+778*999 简便运算
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666*333+778*999 简便运算
666*333+778*999
简便运算

666*333+778*999 简便运算
先拆后提取
666*333+778*3*333
=666*333+2334*333
=(666+2334)*333
=3000*333
=999000

666*333+778*3*333=(666+2334)*333=3000*333=999000

=666*333+(666+112)*999
=666*333+666*999+112*999
=666*(333+999)+112*999
=666*1332+112*999
=2*333*1332+112*333*3
=333*2664+333*336
=333*(2664+336)
=333*3000
=999000

666*333+778*3*333=(666+2334)*333=3000*333=999000

999000

(222*3*333+778*999)=(222+778)*333=1000*999

大错了,是
=(222*3*333+778*999)=(222+778)*999=1000*999

我看了一下大家 的解答,觉得还是不够简便。看我的,

原式= 2*111*3*111*3 + 2*389* 3*3*111
= 2*111*3*3 ( 111+ 389)
=2*111*3*3 * 500
=1000*999
=999000

666*333+778*999
=222*3*333+778*999
=222*999+778*999
=(222+778)*999
=1000*999
=999000