Answer:

Explanation:
You first need to make the denominators the same and the LCM (least Common Multiple of this equation is 10. 
10/10-->1
1/2--> 5/10
2--> 20/10
3/10, the denominator is already 10, so don't need to change. 
10/10+5/10+20/10+3/10=38/10=
=
