22.05*8.2-20.05*4.5-20.5*2.7如何简便运算

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22.05*8.2-20.05*4.5-20.5*2.7如何简便运算22.05*8.2-20.05*4.5-20.5*2.7如何简便运算22.05*8.2-20.05*4.5-20.5*2.7如何简便

22.05*8.2-20.05*4.5-20.5*2.7如何简便运算
22.05*8.2-20.05*4.5-20.5*2.7如何简便运算

22.05*8.2-20.05*4.5-20.5*2.7如何简便运算
22.05*8.2-20.05*4.5-20.5*2.7
=22.05×(8.2-4.5-2.7)
=22.05×1
=22.05

22.05*8.2-20.05*4.5-20.5*2.7
=22.05*4.5-20.05*4.5+22.05*2.7-20.5*2.7+22.05
=(22.05-20.05)*4.5+(22.05-20.5)*2.7+22.05
=2*4.5+1.55*2.7+22.05
=9+4.185+22.05
=35.235