Round 685,135 to the nearest ten thousand.

690,000

Process:
685,135
In the ten thousands place is the number 8. To round to the nearest ten thousand, we have to look at the place value right behind it, the thousands place.

If the number in the thousands place is greater than or equal to 5, we round 8 up to 9. If the number in the thousands place is less than 5, we leave 8 as it is.

We can see that in the thousands place is the number 5, meaning that we round up to 9.

690,000

I hope this helps! Please comment if you have any questions.