Answer:
5
Explanation:
First, we can add the whole numbers together.
1 + 3 = 4
Next, we know that the denominators (base/bottom of fraction) of the fractions are the same, meaning we simply add the numerators (top of fraction).
1/3 + 2/3 = 3/3
3/3 is equal to 1.
Now, we add the 4 from above to this 1 to get our answer, 5.
Feel free to comment down if this doesn't make sense, and I can explain it in a different way.