Answer:
To find out how much flour Kristen used in total, we can start by multiplying the amount of flour per batch by the number of batches.
First, we need to convert the mixed number 3 1/4 to an improper fraction, which is 13/4.
So, the amount of flour per batch is 13/4 cups.
To find out how much flour Kristen used in total for 5 batches of cookies, we can multiply the amount of flour per batch by the number of batches:
13/4 cups per batch x 5 batches = 65/4 cups
We can simplify this fraction by dividing both the numerator and denominator by 5, which gives us:
65/4 ÷ 5/1 = 13/4 ÷ 1/1 = 13/4 cups
Therefore, Kristen used 13 and 1/4 cups of flour in total for 5 batches of cookies.