Phrasal Verbs

Add up to(=conllevar, dar como resultado)
Meaning: Have a certain result 

Example: Trains delays are getting worse and with the high fares, it all ADDS UP TO misery for the commuters.

Add up:(=sumar)

Meaning: To make a mathematical total

Example: We ADDED UP the bill to check it was correct.

Add on(=añadir)
Meaning: Include in a calculation

Example: You have to ADD the VAT ON to the price they give.