Oh, dude, you're hitting me with the big math questions, huh? Okay, so, like, when you round 450, you're looking at the digit right after the 5, which is 0. And since 0 is less than 5, you just leave the 5 as is. So, 450 rounded is still just 450. Easy peasy, right?
When rounding a number, you look at the digit to the right of the place value you are rounding to. In this case, 450 is being rounded to the nearest ten. The digit in the tens place is 5, which is greater than 4, so you would round up. Therefore, 450 rounded to the nearest ten is 450.
You do nothing. 450 is already rounded to the nearest ten.
450
Because 450 is nearer to zero than it is to 1,000.
The smallest whole number that can be rounded to 500 is 450.
450
450
450
450
You do nothing. 450 is already rounded to the nearest ten.
450
450
450
As is. It is already rounded to the nearest tens place.
450
It is: 500
450
450.0