It is then 680 because 5 rounds up to 10
670
700
700
680
680
6
680
It is 900 when rounded to the nearest ten.
490
Nearest hundred? 700
870
Six to the nearest ten is ten. Three to the nearest ten is zero.
674 rounded to the nearest ten is 670.
It is 900 when rounded to the nearest ten.
490
675
680
Nearest hundred? 700
It is: 700
is: 700
870
700
Do you mean 675/10,000,000 then if so it is: 6.75*10-5
674.75 rounded to the nearest whole number = 675