The position of rational number abc on the number axis is simplified as shown in the figure The picture is like this. -------- A -----b --------------0c -------→ That's about it! I did this to the line. You should understand! The algebraic expression is: |A-b a+b|-|c-a b-c| QUQ The position of rational number abc on the number axis is simplified as shown in the figure The picture is like this. -------- A -----b --------------0c -------→ That's about it! I did this to the line. You should understand! The algebraic expression is: |A-b||a+b|-|c-a||b-c| QUQ

The position of rational number abc on the number axis is simplified as shown in the figure The picture is like this. -------- A -----b --------------0c -------→ That's about it! I did this to the line. You should understand! The algebraic expression is: |A-b a+b|-|c-a b-c| QUQ The position of rational number abc on the number axis is simplified as shown in the figure The picture is like this. -------- A -----b --------------0c -------→ That's about it! I did this to the line. You should understand! The algebraic expression is: |A-b||a+b|-|c-a||b-c| QUQ

=-A+b-a-b-c+a+b-c
=-A+b-2c

The positions of corresponding points of rational numbers a, b and c on the number axis are shown in the figure: Try to simplify the following formula:|a-c|-|c-b|-|b-a|+2|a+b|. The position of corresponding points of rational numbers a, b and c on the number axis is shown in the figure: Try to simplify the following formula:|a-c|-|c-b|-|b-a|+2|a+b|.

According to the meaning of the question: c < a <0< b, and |a|<|c|<|b|,
A-c >0, c-b <0,b-a>0, a+b >0,
The original formula = a-c+c-b-b+a+2a+2b=4a.