The expression is 3 – 11.
To subtract 11 means add -11.
First locate 3 then 11 units to left
The final position is –8
The sum is –8.
![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/userfiles/image/steps_images/step2.JPG\")
![\"\"](\"/userfiles/image/graph%20pa9_p63.gif\")
![\"\"](\"/userfiles/image/steps_images/solution.JPG\")