Answer: E.G. 70 rounded to the nearest 100 is 100. It rounds up because it is higher than 49, which would round down
500 rounded to the nearest 1000 would be 1000 because it is over 500.
Anything over five will be rounded up (5,6,7,8,9)
Anything under 5 will be rounded down (1,2,3,4)
Hope this helps!
