Question

已知a b c在数轴上的位置如图所示,且丨a丨

Answer 1

解由图知a+c＞0,a-b＜0,c-b＞0

故/a+c/+/a-b/-/c-b/

=a+c+[-(a-b)]-(c-b)

=a+c-a+b-c+b

=2