The position of rational numbers a, b, c on the number axis is shown in the figure.

The position of rational numbers a, b, c on the number axis is shown in the figure.

According to the number axis, b < a <0< c <1,
A+b <0, b-2<0, a-c <0,2-c>0,
The original formula is -a-b+b-2+a-c-2+c=-4.

The position of rational number abc on the number axis is shown in the figure below. Figure:-----a -------b ------------------0------ c Absolute value of ab is reduced to a + b absolute value of 1-bc absolute value of 2bc

According to the position of rational numbers a, b, c on the number axis,
A <0, b <0,0< c, then ab <0, bc <0,
So a/|ab 1/|b|-2bc/|bc|
= A/ab-1/b+2bc/bc
=2

According to the position of rational numbers a, b, c on the number axis,
A <0, b <0,0< c, ab <0, bc <0,
So a/|ab 1/|b|-2bc/|bc|
= A/ab-1/b+2bc/bc
=2