How do you add a fraction to a regular number? ex.) 1/2 + 3

You will have to find a common denominator the add the numerators divided by the denominator you found

e.g.) 1/2 and 3 has a common denominator of 2 so you multiply 3 by 2 and 1/2 by 1 so it'll be 1+6 / 2 = 7/6

A whole number can be treated as a fraction too, by giving it a denominator.
A whole number can be expressed as a fraction by giving it a denominator.
Then to add two fractions, you need to give them a common denominator, so multiply the numerator and denominator of our newly created fraction by the denominator of the original fraction. Then you can add the numerators.