简便运算:9.8*62.5*1.25-12.5*0.625*18

来源:学生作业学帮网 编辑:学帮网 时间:2024/05/21 02:32:32

简便运算:9.8*62.5*1.25-12.5*0.625*18

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

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