Iam done with my homework but i am so bad at rounding can some one tell me if it is correct. and you.. i am on 4th grade hopefully going to 5th

They are all correct! :)

An easy way for me to remember when to round is if the answer has a decimal point higher or lower than 0.5 .
If a number has a decimal less than .5, round down (for example, if it was 2.3, it would be rounded to 2).
If a number has a decimal .5 or higher, I round up (4.5 would be rounded to 5, 6.7 would be rounded to 7)

You got all these right. Great job Esteban! I'm sure you'll be moving on to 5th grade. Hope this helps :)

Hopefully this makes sense!