Problem rounding numbers?

Question

My mathbook question says to round this number: .8999 to the nearest ten thousandths. The answer it gives is 1. Why in the world is the answer 1 when rounding .8999 to the nearest ten thousandths?! My answer was .9 Doesn't that make more sense? Please tell me why the answer is 1. Also how am I supposed to guess what to round to when there is nothing to the right of the number I'm supposed to round? For example if I was supposed to round .56 to the nearest hundreths, would the answer be .56 or .57? Please help me with both of these questions. Thank you.

Answer 1

You are right. It is 0.9 not 1.

0.56 is already to the nearest hundreths so you would not mess with it.