Significant digits question

Question

182.516 + 13.1 + 8.0004 = 203.6164

My Answer was 204 because the least accurate number has 3 sig digits

But my physics books answer was 203.6?

Answer 1

When adding or subtracting, the answer has the same number of sig figs as the number with the least digits after the decimal point. Basically, you just line up the decimal points and add/subtract like this: