Given the position of ABC on the number axis, as shown in the figure below, simplify a / | ab | + 1 / | B | - 2BC / | BC| Figure: a-b-0-c | Math enthusiast | Mathematical art

Given the position of ABC on the number axis, as shown in the figure below, simplify a / | ab | + 1 / | B | - 2BC / | BC| Figure: a-b-0-c

According to the meaning of the title:
a＜b＜0＜c；
The original formula = A / (AB) + 1 / (- b) - 2BC / (- BC)
=1/b-1/b+2
=2;
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