负数乘负数-7×(-3)×(-0.5)+(-12)×(-2.6)=
问题描述:
负数乘负数-7×(-3)×(-0.5)+(-12)×(-2.6)=
答
21*(-0.5)+31.2=-10.5+31.2=20.7
负数乘负数-7×(-3)×(-0.5)+(-12)×(-2.6)=
21*(-0.5)+31.2=-10.5+31.2=20.7