No, you would only multiply the last 1 by zero, as you do multiplication first, by PEMDAS. Then, you would add or subtract the remainder of the ones.
To answer the question, you would use PEMDAS to answer any math question, especially if there are no parentheses.
Here...

I posted an answer, and I bet others have, as well, but mine keeps disappearing and reappearing. O.O
When I go to My Questions and Answers, this problem shows up, but not always does my answer.
How would I report this problem?

You must develop a hypothesis, but then, reverse it, also known as the "null hypothesis."
Ex.
H0: If I change the batteries in my flashlight, it will work.
Ha: If I change the batteries in my flashlight, it won't work.
Or, since the remainder of the question...

Opposite sides are congruent, opposite angles are congruent, and the consecutive angles are supplementary.
Read if you need more detail:
If this is a true parallelogram, both sets of opposite sides and angles must be equal. If one set is not equal, the lines will not be parallel...