IPA: /ˌmæθəˈmætɪkli/
KK: /mæθəˈmætɪkli/
In a way that relates to mathematics or uses mathematical methods.
The problem was solved mathematically, showing the importance of calculations in finding the answer.
Mathematically → It is formed from "mathematics" (from Greek "mathematike", meaning the art of learning) and "-ally" (meaning in a manner of). The word "mathematically" means in a manner relating to the art of learning or mathematics.
Think of the art of learning ('mathematics') and how 'ally' means in a manner of — so mathematically means in a manner related to learning or mathematics.