9. Mr. and Mrs. Perry packed their lunch 5 days in a row. Each of them packed 3 oatmeal cookies for dessert every day. What is the total number of cookies they packed for lunch that week?
5 * 3 = 15
Total = 2*(5*3) = 30 cookies.
To find the total number of cookies they packed for lunch that week, we need to determine how many cookies they packed each day and then multiply that by the number of days.
First, let's find out how many cookies each of them packed per day. We are told that both Mr. and Mrs. Perry packed 3 oatmeal cookies for dessert every day. Therefore, each day they packed a total of 3 + 3 = 6 oatmeal cookies.
Now that we know the number of cookies packed per day, we can multiply that by the number of days in a week, which is 5.
6 cookies per day * 5 days = 30 cookies
Therefore, Mr. and Mrs. Perry packed a total of 30 cookies for lunch that week.