Filled book = 64 stamps 5 weeks = 25 stamps. So first calculate how many more stamps she has left to collect if she want to fill the book up :)
Number of stamps left to collect = No. of stamps in filled book - 25 stamps Number of stamps left to collect = 64 - 25 = ?
yep :) so number of stamps left to collect = 39 We want to find how many weeks it will take to collect 39 stickers if she collects them at 3 stickers per week.
so 39 divided by 3 = ?
yesss :D now total number of weeks = 5 weeks + 13 weeks = ?
yay! thanks! ^.^
you're welcome ^_^