400
To the nearest hundred, 800
To the nearest hundred, 600
760
Well, honey, 759 rounded to the nearest ten is 760. Simple math, no need to make it more complicated than it needs to be. Just bump that 9 up to a nice, round 10 and call it a day.
It is then 800 to the nearest hundred because 50 then becomes 100
800
800
800
400
To the nearest hundred, 800
To the nearest hundred, 600
To the nearest hundred, 500
one hundred
To the nearest hundred, 300
estimated
Yes, to the nearest hundred.