add up to something means equal (e.g. I paid add up to $100)
ask around means ask people the same question (e.g. He asked around but nobody has seen his book.)
ask somebody out means invite on a date (e.g. Tom asked Ann out to dinner and a movie.)
away means away from home/ a place/ a person etc. (= walk away, run away, look away etc.) (e.g. The woman got into her car and drove away)