Mathematical jargon refers to the use of specific words and phrases that are used in math. It's like a special language that mathematicians use to talk about math concepts and problems.
For example, instead of saying "five plus five equals ten," mathematicians might say "the sum of five and five is ten." This is because they use specific terms and phrases to be more clear and specific about what they're saying.
Mathematical jargon can be confusing for people who are not used to it, and that's why sometimes it seems like math is a foreign language. However, with practice and patience, anyone can learn to understand mathematical jargon and become fluent in the language of math.