Letter M — Math Terms — Definition, Formula & Examples
Letter M in our A-to-Z math glossary covers key math terms beginning with M, such as mean, median, mode, midpoint, multiplication, mixed number, and more.
This is an alphabetical index entry listing mathematical vocabulary that begins with the letter M, organized to help students quickly locate definitions, formulas, and explanations for commonly encountered middle-school math concepts.
How It Works
Use this page as a quick-reference directory. Browse the list of M-terms to find the concept you need, then follow the link to its full definition and worked examples. Terms are grouped alphabetically so you can scan efficiently. Whether you are reviewing for a test or looking up a word from class, this index helps you jump straight to the right page.
Example
Problem: A student encounters the word "median" on a homework assignment and does not remember what it means. How would they use this glossary page?
Step 1: Navigate to the Letter M index page in the A-to-Z math glossary.
Step 2: Scan the alphabetical list and locate "Median."
Step 3: Click through to the full entry to read that the median is the middle value when a data set is ordered from least to greatest. For example, in the set {3, 7, 9}, the median is .
Answer: The student finds that the median of {3, 7, 9} is 7 — the middle value in an ordered list.
Why It Matters
Many M-terms — mean, median, mode, midpoint, mixed numbers, multiplication — appear repeatedly across middle-school math and standardized tests. Having a single organized index saves time when studying or completing assignments.
Common Mistakes
Mistake: Confusing similar M-terms like mean, median, and mode.
Correction: Mean is the average (sum divided by count), median is the middle value in an ordered set, and mode is the most frequently occurring value. Visit each term's dedicated page for full details.