Beth's summer vacation lasted 87 days. At the beginning of her vacation, she spent 3 weeks at soccer camp, 5 days at her grandmother's house, and 13 days visiting Glacier National Park with her parents. How many vacation days remained?
so 1 week=7 days
3 weeks=7 times 3=21 days
5 and 13
so 87-21-5-13=days left=48 days
Beth has days of vacation.
She spent :
3 weeks = 37 days = 21 days at soccer camp
5 days at her grandmother's house
13 days visiting the Park
That makes 21+5+13=39 days.
She thus has 87-39=48 days remaining.