## Chemistry: The Molecular Nature of Matter and Change 7th Edition

When rounded to include one less significant figure, the calculation becomes: $(20\times160\times8)\div(3\times3\times5)$, which becomes $25,600\div45$ which is equal to 568.8 repeating. This rounded to 2 significant figures is 570. The answer must be rounded to two significant figures because the largest number of significant figures included in the multiplication and division problem is 2.