9.8X65.2x1025—12.5x0.652x18的简便计算过程.

问题描述:

9.8X65.2x1025—12.5x0.652x18的简便计算过程.

9.8X65.2x1.25—12.5x0.652x18
=9.8X65.2x1.25—1.25x65.2x1.8
=1.25x65.2x(9.8-1.8)
=65.2x1.25x8
=65.2x10
=652