简便运算：9.8*62.5*1.25-12.5*0.625*18_数学解答

简便运算：9.8*62.5*1.25-12.5*0.625*18

人气：379 ℃　时间：2019-10-01 09:31:33

解答

9.8*62.5*1.25-12.5*0.625*18
=9.8*62.5*1.25-1.25*62.5*1.8
=62.5*1.25*（9.8-1.8）
=62.5*1.25*8
=62.5*10
=625