How do you exclude Social Security from a foreign country (under a Tax Treaty) on the Form 1040?  Do you include on line 5b and then deduct on line 7a for a U.S. Citizen living in that foreign country?

Does the same treatment apply for the above scenario but the U.S. Citizen is getting Social Security and living in the U.S.?  

In both instances the Social Security is for work performed.