初一有理数的除法(要列式)-3-[-5+(1-0.2*5分之3)/(-2)]

问题描述:

初一有理数的除法(要列式)
-3-[-5+(1-0.2*5分之3)/(-2)]

=-3-【-5+(1-5分之1×5分之3)÷(-2)】
=-3-【-5+25分之22÷(-2)】
=-3-【-5+(-25分之11)】
=-8又25分之11

-3-[-5+(1-0.2*5分之3)/(-2)]
=-3-[-5+(1-1/5*3/5)/(-2)]
=-3-[-5+(1-3/25)/(-2)]
=-3-[-5+(22/25)/(-2)]
=-3-[-5+22/25*(-1/2)]
=-3-[-5-11/25]
=-3+5+11/25
=2+11/25
=2又11/25