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In math a definition is some expression like A ~ B where A is the "thing you're defining", B is the "mathematical description", and ~ just means that I'm relating these 2 things. In that case, let's say I have a statement about A (maybe A here is a linear transformation).
- 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.
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.
Explore a comprehensive Math Dictionary that's easy for kids! It has clear definitions for important Math words aligned with the CCS. Dive into simple explanations, fun visuals, and practice problems.
Free maths dictionary for students with over 955 common math words, math terms and maths definitions explained in simple language with visual examples. A math glossary with mathematics definitions, explanations, examples, math charts and posters for students and teachers. © Jenny Eather 2020.
A mathematical model based on the area of a rectangle, used to represent multiplication or to represent fractional parts of a whole. For any numbers x, y , and z: (x + y) + z= x + (y + z). A distinguishing characteristic of an object such as angles or sides of a triangle. See: Mean. A number line in a plane. Plural form is axes.
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