Well, honey, 700 rounded to the nearest 10 is still 700. No need to change a thing, it's already sitting pretty on a nice round number. So, go ahead and keep on strutting your stuff, 700, you're doing just fine.
When rounding 700 to the nearest 10, you look at the digit in the tens place, which is 0. Since 0 is less than 5, you would round down to the nearest 10. Therefore, 700 rounded to the nearest 10 is 700.
Oh, dude, 700 rounded to the nearest 10 is like... 700. Yeah, no change there. It's already perfectly sitting at the 700 mark, so no need to nudge it up or down. Just let it chill at 700, man.