help me out here! please

Answer: The third one 0.750 L
Explanation: 1,000 Millilitres equal 1 Liter
500 + 250 = 750 (Not A Liter)
So 0.750 L
Answer:
0.75L
Explanation:
I guess you know what's the total milliliters he drank right? 750ml
To convert ml to L, you have to know 1000ml is equal to 1L. So all you have to do is to divide the 750 by 1000 which is 0.750ml.