Given the following calculations below, what would be the proper solutions be (incorporating significant figures)?

10.0 + 2.0(3.3333333) = 10.0 + 6.7 = 16.7

Notice that I rounded 2.0(3.3333333) = 16.6666666 to 16.7.

I am not sure if 16.7 is the right answer. I feel that it is 17 since the least precise measurement in the last arithmetic step has only two significant figures, being 6.7.