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999x222+333x334怎样巧算!!!!!!

化为(222+777)*222+333*(333+1)

999换成1000-1.334换成333+1,再合并相加

原式=333x3x222+333x334=333x666+333x334=333x(666+334)=333x1000=333000

333x334+999x222 =333x334+333x666 =333x(334+666) =333x1000 =333000

999x222十333x334 =333×3×222+333×334 =333×666+333×334 =333×(666+334) =333000

999x222+333x334 =333x222x3+333x334 =333x(222x3+334) =333x(666+334) =333x1000 =333000

180÷15+25x16 =180÷3÷5+25x4x4 =60÷5+100x4 =12+400 =412

333x334+999x222 =333x334+333x3x222 =333x(334+666) =333x1000 =333000

原式 =333x3x222+333x334 =333x666+333x334 =333x(666+334) =333x1000 =333000

999x222+333x334 浏 =333×666+333×334 =333×(666+334) =333×1000 =333000

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