To round 810 to the nearest ten, you need to look at the digit in the tens place, which is 1. Since this digit is less than 5, you would round down to 810. Therefore, 810 rounded to the nearest ten remains 810.
It rounds to 810.
810
810
813 rounded to the nearest 10 is 810.
810
810
810
810
810810
810
807 rounded to the nearest tens is 810
in 806 the ten's place is the zero, so the way to think about it is 806 closer to 810 or 800? the answer is 810 if it were the hundreds place, the choice would be 800 or 900, so the answer would be 800 (since 806 is closer to 800 than 900)