First of all, you need to change all of them to lowest terms.
1/2=1/2 (the same)
5/10=1/2 (5 divided by 5& 10 divided by 5)
2/4=1/2 (2 divided by 2 & 4 divided by 2)
1/2+1/2+1/2= 1 1/2 (mixed numbers) or 3/2 (improper fraction)
So, the answer to your question is 1 1/2 or 3/2 .
Hope it helps.
Can you choose mine as the brainliest answer