Ah, rounding numbers can be a peaceful journey. If we look at 80 and want to round it to the nearest 10, we see that it's already a multiple of 10. So, 80 rounded to the nearest 10 is still 80. Just a little touch-up to keep things nice and balanced.
When rounding a number to the nearest 10, you look at the digit in the tens place. In this case, the digit in the tens place is 8. Since 8 is greater than or equal to 5, you would round 80 up to the next multiple of 10, which is 90.
Oh, dude, 80 rounded to the nearest 10 is like... 80! Because, you know, it's already a multiple of 10. So, it's not going anywhere. It's just chilling at 80, not needing any rounding up or down.