Answer:
He adds 4 ounces of water to each glass
Step-by-step explanation:
Given that he gets 4 glasses in which he splits 2 cups of water evenly.
This means every glass gets 2/4 cups of water, that is 1/2 cups.
1 ounce = 0.125 cups
Let x ounce = 1/2 cups
Then 0.125x = 1/2 = 0.5
x = 0.5/0.125 = 4
He adds 4 ounces of water to each glass