| Transformation | the flipping, sliding, or turning or a plane figure |
| Translation | a change in a figure that moves it up, down or over |
| Rotation | a change in a figure that rotates it around a point |
| Reflection | a change in a figure that produces a mirror image of the figure |
| Congruent | figures that are the same shape and same size |
| X axis | The horizontal line on the bottom of a Quadrant 1 graph |
| Y axis | The vertical line on the bottom of a Quadrant 1 graph |
| Ordered Pair | The two numbers used to locate a point on a line, on a surface, or in space |
| Co-ordinate grid | Use to graph and name the location of points in a plane |
| Digit | The Arabic numerals used to write numbers 0 - 9 |
| Origin | The point at which the x and y axis intersect. |
| Expanded form | A way to write a number that shows the place vlaue of each digit. |
| Word form | A number written in words using place value |
| Standard Form | A number written in digits using commas to separate groups of 3 digits |
| Period | A group of 3 digits in a number. Periods are separated by a comma and start from the right of a number. |
| Compatible Numbers | Numbers that are easy to compute mentally |
| Rounding | A process that tells which multiple of 10, 100, 100, etc. A number is closest to |
| Difference | The answer to a subtraction problem |
| Sum | The answer to an addition problem |
| Equation | A number sentence with an equal sign. |
| Variable | A letter such as "n" that stands for a number in an equation. |
| Estimate | An approximate rather than an exact number |
| Product | The answer to a multiplication problem |
| Factors | The numbers that are multiplied to get a product. |
| Quotient | The answer to a division problem |
| Dividend | The number to be divided |
| Divisor | The number used to divide another number. |
| Prime Number | A whole number with only 2 factors, 1 and itself |
| Composite Number | A whole number with more than 2 factors |
| Median | The middle number in an ordered set of data |
| Mode | The data value that occurs most often in a set of data |
| Range | The difference between the largest value and the smallest value in a data list |
| Mean | The average of a set of numbers |
| Divisible | A number is divisible by another number if there is no remainder after dividing. |
| Fraction | A symbol used to name a part of a whole, a part of a set, a location on a number line or a division of whole numbers |
| Numerator | The number above the fraction bar |
| Denominator | The number below the fraction bar. |
| Mixed number | A number that has a whole number part and a fractional part |
| Improper fraction | A fraction whose numerator is greater than or equal to it's denominator. |