42*(-2/3)+(-3/4)/(-0.
问题描述:
42*(-2/3)+(-3/4)/(-0.
答
42*(-2/3)+(-3/4)/(-0.25) =-42*2/3+3/4*4 (小数写成分母形式,符号负负得正) =-14*2+3 =-28+3 =-(28-3) =-25
42*(-2/3)+(-3/4)/(-0.
42*(-2/3)+(-3/4)/(-0.25) =-42*2/3+3/4*4 (小数写成分母形式,符号负负得正) =-14*2+3 =-28+3 =-(28-3) =-25