5 or more add one more, 4 or less no need to stress. So in 3.64 the tenth is 6 so when you round it, it will equal 3.6. When a number is 5 + then you add one more number. But when a number is 4 or less the number will just vanish.
ANSWER:
3.6
Hope this helped! (Remember that little trick if you remember it, it will help. 5 or more, add 1 more. 4 or less no need to stress.) Have a great day. A thank you and (or) brainliest is always appreciated! Goodbye!
