How much will u left over if you take 200mL from 1.2L?

ML stands for milliliters. The prefix milli means 1,000. One liter contains 1,000 milliliters.

Therefore you want to convert the 200 mL to liters by dividing by 1,000. This gives you 200mL = 0.2L.

If you subtract the 0.2L from 1.2L you get 1L left.