Answer:
"Calculation" is a mathematical determination of finding the size or number of something while "pattern" is a sequence of elements that is being repeated in a predictable manner.
Explanation:
Calculation- This process allows you to put elements together or transform them into a new result. It produces an obvious change.
For example: 7 x 6 = 42
The numbers 7 and 6 when multiplied produces 42.
Pattern- This process allows you to put the elements in an intelligible way. The elements are organized or repeated regularly.
For example: A, B, C, A, B, C, A, B, C
It is noticeable that the letters A, B and C are being repeated in the same way.