简便计算:3.25x(7.4一0.86)

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简便计算:3.25x(7.4一0.86)简便计算:3.25x(7.4一0.86)简便计算:3.25x(7.4一0.86)3.25x(7.4一0.86)=6.5*(7.4一0.86)/2=6.5*(3.

简便计算:3.25x(7.4一0.86)
简便计算:3.25x(7.4一0.86)

简便计算:3.25x(7.4一0.86)
3.25x(7.4一0.86)
=6.5*(7.4一0.86)/2=6.5*(3.7-0.43)=6.5*3.27=21.255

原式=3.25×7.4-3.25×0.86
=24.05-4.11
=19.94