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If the positions of rational numbers a, B and C on the number axis are shown in the figure below, where 0 is the origin. (1) find the value of the formula A / | a | + | B | / B + C / | C | + | ABC | / ABC --。 ---------------。 ----。 ---------。 ------------- a b 0 d
a/|a|+|b|/b+c/|c|+|abc|/abc
=-1-1+1+1
=0
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