数学计算题;(-6)-(+6)-(-7)=?-︱-2/3-(-3/2)︱-︱(-1/5)+(2/5)︱=?

问题描述:

数学计算题;(-6)-(+6)-(-7)=?-︱-2/3-(-3/2)︱-︱(-1/5)+(2/5)︱=?

(-6)-(+6)-(-7)
=-12-(-7)
=-5
-|-2/3-(+2/3)|-|(-1/5)+(-2/5)|
=-|-2/3-2/3|-|-1/5-2/5|
=-|-4/3|-|-3/5|
=-4/3-3/5
=-11/15