22.05*82-20.05*4.5-20.05*8简便方法怎么算?

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22.05*82-20.05*4.5-20.05*8简便方法怎么算?
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22.05*82-20.05*4.5-20.05*8简便方法怎么算?
22.05*82-20.05*4.5-20.05*8简便方法怎么算?

22.05*82-20.05*4.5-20.05*8简便方法怎么算?
22.05*82-20.05*4.5-20.05*8
=20.05*(82-4-8)+2*82-20.05*0.5
=20.05*70+164-10.025
=1557.475