Fraction multiplication is a way of doing math. You multiply the numerators together and the denominators together. If you can simplify, simplify first. You can't multiply the numerator by the denominator.

"Reflection" in math mainly refers to the mirror symmetry operation in geometric transformations, which means flipping points, lines, or shapes across a line (for plane reflection) or a point (for central symmetry) to create a congruent mirror image; this is a type of rigid (isometric) transformation. Also, in mathematical logic, the "reflection principle" is a deep concept in set theory about the consistency between a formal system and the models of its finite subsystems.

Fraction calculations mainly include the four basic operations: addition, subtraction, multiplication, and division, and each operation has clear rules.

Reflection symmetry is just mirror symmetry; an object can perfectly overlap with its original after being flipped along a line or plane.

Fraction subtraction mainly depends on whether the denominators are the same. If they are, just subtract the numerators. If they're different, find a common denominator first, then subtract, and simplify the result if possible.

The core of reverse percentage calculation is using division. The formula is 'Total = Part ÷ Percentage.' This usually means if you know what percentage of a number something is, you can find the whole number.

A fraction line is the horizontal line drawn between the numerator and the denominator. Sometimes, this line can also appear as a slash '/', with the numerator on the left and the denominator on the right.

A system of equations is a set of two or more equations, and the solution needs to satisfy all the equations at the same time. Simply put, it’s like putting a few formulas together, and the unknowns inside (like x, y) have to be the same number in all the formulas in order to get the result.

Analyzing data usually refers to using statistical methods to organize, study, and summarize a large amount of collected data, extracting useful information and forming conclusions to help with business or operational decisions. In English, it's commonly called Data Analysis or Analyze Data.

A square root is basically the inverse operation of exponentiation. For example, 2 squared is 4, and conversely, the square root of 4 is 2.