Round 297.85 square kilometer to the nearest tenth of a square kilometer?

Answer 1

297.8 square kilometres.

Now here is a minor digression that you may (or may not) find is of interest:

There are different views on how the digit 5 should be rounded - up or down. 1,2,3 and 4 are always rounded down; 6,7,8 and 9 are always rounded up and 0 does not need rounding. So if you always round 5 down, you will round down 5 numbers and up 4 and so introduce a downward bias in your work. Conversely, if you always round up you will introduce an upward bias. You could randomly decide to round up or down but this makes it more difficult for others to follow what you have done. The recommended answer is to round 5 so that the previous digit is EVEN.

Thus 0.15 is rounded up to 0.2

and 0.45 is rounded down to 0.4