999*778+333*666等于多少?

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999*778+333*666等于多少?

999*778+333*666等于多少?
999*778+333*666等于多少?

999*778+333*666等于多少?
999*778+333*666 = 999 000
先乘除后加减
999×778+333×666
=999×778+333×(3×222)
=999×778+333×3×222
=999×778+999×222
=999×(778+222)
=999×1000
=999000