1999+999*999=?(巧算)

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1999+999*999=?(巧算)
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1999+999*999=?(巧算)
1999+999*999=?(巧算)

1999+999*999=?(巧算)
请采纳我的答案为最佳吧
1999+999*999
=1000+999+999*999
=1000+999*1+999*999 同时提取999
=1000+999*(1+999)
=1000+999*1000
=1000*(1+999) 同时提取1000
=1000*1000
=1000 000

1999+999*999
=1000+999+999*999
=1000+999*(1+999)
=1000+999*1000
=1000*(1+999)
=1000*1000
=1000000

1999+999*999=
=1000+999+999*999
=1000+999*(999+1)
=1000+999*1000
=1000+999000
=1000000

1999+999*999
=1000+999+999*999
=1000+999*(999+1)
=1000*(999+1)
=1000000