1993×199.2-1992×199.1=( )
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![1993×199.2-1992×199.1=( )](/uploads/image/z/3932315-35-5.jpg?t=1993%C3%97199.2-1992%C3%97199.1%3D%28+%29)
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1993×199.2-1992×199.1=( )
1993×199.2-1992×199.1=( )
1993×199.2-1992×199.1=( )
1993×199.2-1992×199.1
=(199.3×1992-1992×199.1)
=1992×(199.3-199.1)
=1992×0.2
=398.4
78647207.76