8÷【(40.75-9.5)×0.4】-0.64怎样简算
问题描述:
8÷【(40.75-9.5)×0.4】-0.64怎样简算
答
8÷[(40.75-9.5)×0.4]-0.64
=8÷(31.25×0.4)-0.64
=8÷12.5-0.64
=(8×8)÷(8×12.5)-0.64
=64÷100-0.64
=0.64-0.64
=0