The total number of pies they made altogether is 100.
In order to determine this value, add the number of blueberry pies with the number of apple pies. Addition is the mathematical operation that is used to determine the sum of two or more numbers.
The total number of pies = 55 + 45 = 100 pies
To learn more about addition, please check: https://brainly.com/question/19628082
#SPJ1