333X555十3X111X111怎么巧算
=3*111*5*111+3*111*111
=3*111*111*(5+1)
=3*111*111*6
=333*666
=333*(600+60+6)
=333*600+333*60+333*6
=199800+19980+1998
=(200000-200)+(20000-20)+(2000-2)
=(200000+20000+2000)-(200+20+2)
=222000-222
=221778
333×555+3×111×111
=333×555+333×111
=333×（555+111）
=333×666
=333×3×222
=999×222
=（1000-1）×222
=1000×222-1×222
=222000-222
=221778
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