You would round the number down - to 8 million.
It is 849.
800
800
850
800
It is: 850 and not 849
800
849
You can either:Round to the nearest ten: 795 - 804Round to the nearest hundred: 750 - 849
800
It is 800 because 40 is less than 50
It then is 800 because 49 is less than 50