999× 778+333× 666

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999×778+333×666999×778+333×666999×778+333×666999×778+333×666=999×778+333×(3×222)=999×778+333×3×222=9

999× 778+333× 666
999× 778+333× 666

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

999000

计算器!

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

原式=999*778+999*222
=999*(778+222)
=999*1000
=999000