六年级简便计算9.8*65.2*1.25-12.5*0.625*18过程!急用!_数学解答

六年级简便计算9.8*65.2*1.25-12.5*0.625*18
过程!急用!

人气：295 ℃　时间：2019-12-09 17:55:17

解答

9.8*62.5*1.25-12.5*0.625*18
=9.8*6.25*12.5-12.5*0.625*18
=12.5*(9.8*6.25-6.25*1.8)
=12.5*6.25*8
=12.5*8*6.25
=100*6.25
=625