负4分之3的2次方乘(12-1有3分之1-0.4)
问题描述:
负4分之3的2次方乘(12-1有3分之1-0.4)
答
=(9/16)×(12-4/3-2/5)
=(9/16)×12-(9/16)×4/3-(9/16)×2/5
=27/16-12/16-9/40
=15/16-9/40
=75/80-18/80
=57/80