What is 0.638 rounded to the nearest tenth?

Answer 1

0.6

Answer 2

0.638 rounded to the nearest tenth = 0.6

The next digit at the right of 6 is 3 which is less than 5, so retain 6.

If the next digit at the right of 6 is equal or more than 5, add 1 to 6 which will make it 7. (0.7)

Answer 3

0.6