0.78*98 用简便计算
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0.78*98 用简便计算
0.78×98
=0.78x(100-2)
=0.78x100-0.78x2
=78-1.56
=76.44
0.78*(100-2)=0.78*100-0.78*2=78-1.56=76.44
0.78*98 用简便计算
0.78×98
=0.78x(100-2)
=0.78x100-0.78x2
=78-1.56
=76.44
0.78*(100-2)=0.78*100-0.78*2=78-1.56=76.44