what is 1/3+1/8 ? please help i am in 5th grade

You have to make the bottoms (denominators) the same.  It will be 24

Look at this

https://www.mathsisfun.com/fractions_addition.html

or maybe watch this

https://www.khanacademy.org/math/cc-fifth-grade-math/cc-5th-fractions-topic/cc-5th-add-sub-fractions/v/adding-fractions-with-unlike-denominators