0.9999*1.3-0.1111*2.7怎么简便运算?

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0.9999*1.3-0.1111*2.7怎么简便运算?
0.9999*1.3-0.1111*2.7怎么简便运算?

0.9999*1.3-0.1111*2.7怎么简便运算?
0.9999*1.3-0.1111*2.7
=0.9999*1.3-0.1111*9*0.3
=0.9999*1.3-0.9999*0.3
=0.9999*(1.3-0.3)
=0.9999

=0.9999*1.3-0.1111*9*0.3
=0.9999*1.3-0.9999*0.3
=0.9999*(1.3-0.3)
=0.9999*1
=0.9999