Addition Word Problems — Examples & Practice

Cassidy has been practicing for her opera audition for the past month. The first week she practiced for twelve hours. The second week, about ten. During the third week, Cassidy really started kicking it into gear and practiced eighteen hours. The last week before her audition, Cassidy knew she had to do well so she spent twenty hours preparing! In total, how many hours did Cassidy spend getting ready for this audition?