Answer:
320 mL
Step-by-step explanation:
1 L = 1,000 mL 2 L = 2,000 ml w = 2,000 ml - 320 mL I convert the amount of water Matthew drank, 2 liters, into milliliters. Then, I subtract from 2,000 mL the excess amount of water that Matthew drank, which is 320 ml.