The property here is the Commutative Property of Addition.
Answer:

Step-by-step explanation:

11 * 14 = 154 lbs since 11lbs=1 stone 11 stones =154lbs
It could be greater if that number was a negative or if the number is a positive it could be less then it's opposite. ex. 58 is greater than -58 they are opposite. ex.-19 is less than 19
Answer:
20.655
Step-by-step explanation:
might have to round it