2500 to the nearest ten thousand

3000

Explanation:

First, identify the values of your number

2: thousand

5: hundred

0: tens

0: ones

So, the 2 is in the thousands place! But, we need to look at our 5, to determine whether or not to round UP, or DOWN.

Since, 5 is greater than 4, we'd round the 2 UP to 3, thus 3,000