What is 639.497 rounded to nearest tenth?

Answer 1

639.497 rounded to the nearest tenth is 639.5. When the tenths digit is less than 5 the number is rounded down. When the tenths digit is 5 or more the number is rounded up. In this case the tenths digit is more than 5, so you round up.

Answer 2

639.497 round to the nearest tenth is 639.5

Remember in decimals , 'tenths' is the first number to the right of the decimal point. 'Hundredths/thousandths' is the second/third number to the right of the decimal point.

So for the moment ignore the '4' (tenths). Is the next number '5' or greater? Yes, it is at '9'. So round up the '4' to '5'.

Hence 639.497 rounded to tenths is 639.5.

Another way is to say is 497 nearer 500 or 400? It is only three places from 500 , but 97 places from 400. So it is nearer 500. Hence 497 rounds to 500. It follows 639.497 rounds to 649.5