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Illustrated Mathematics Dictionary. Easy-to-understand definitions, with illustrations and links to further reading. Browse the definitions using the letters below, or use Search above.
- Congruent Definition
Illustrated definition of Congruent: The same shape and size...
- Sum Definition
The result of adding two or more numbers. Example: 9 is the...
- Difference Definition
The result of subtracting one number from another. How much...
- Product Definition
Illustrated definition of Product: The answer when two or...
- Like Terms Definition
Terms whose variables (such as x or y) with their exponents...
- Equation Definition
An equation says that two things are equal. It will have an...
- Real Number Definition
The type of number we normally use, such as 1, 15.82, −0.1,...
- Integer Definition
Illustrated definition of Integer: A number with no...
- Variable Definition
Illustrated definition of Variable: A symbol for a value we...
- Distributive Law Definition
The Distributive Law says that multiplying a number by a...
- Congruent Definition
May 2, 2024 · Use this glossary of over 150 math definitions for common and important terms frequently encountered in arithmetic, geometry, and statistics.
- Anne Marie Helmenstine, Ph.D.
Glossary of Mathematical Terms & Definition to use as a quick reference for some of the words commonly used in this website.
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- Addition Is ...
- Subtraction Is ...
- Multiplication Is ...
- Division Is ...
- A Fraction Is ...
- A Percentage Is ...
- Average (Mean) Is ...
... bringing two or more numbers (or things) together to make a new total. The numbers to be added together are called the "Addends":
... taking one number away from another. Minuend − Subtrahend = Difference Minuend:The number that is to be subtracted from. Subtrahend:The number that is to be subtracted. Difference: The result of subtracting one number from another.
... (in its simplest form) repeated addition. Here we see that 6+6+6 (three 6s) make 18: It can also be said that 3+3+3+3+3+3 (six 3s) make 18 But we can also multiply by fractions or decimals, which goes beyond the simple idea of repeated addition:
... splitting into equal parts or groups. It is the result of "fair sharing". Division has its own special words to remember. Let's take the simple question of 22 divided by 5. The answer is 4, with 2left over. Here we see the important words: Which can also be in this form:
... part of a whole. The top part (the numerator) says how many parts we have. The bottom part (the denominator) says how many parts the whole is divided into. See Fractionsfor more details.
... parts per 100. The symbol is % Example: 25% means 25 per 100 (25% of this box is green) See Percentagesfor more details.
... the sum divided by the count. We calculate the average by adding up all the values, then divide by how many values. See Meanfor more details.
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