| A | B |
|---|
| Place Value | The relative worth of each digit in a number which is determined by its position |
| Partial Sums Method | An addition procedure in which sums are computed for each place separately and then added to yield a final sum |
| Trade First Method | Subtraction in which all necessary trades are done before subtraction can be carried out |
| Mean | A measure of central tendency. It is found by adding the numbers and dividing the sum by the number of numbers |
| Mininum | The smallest number in a set of numbers |
| Maximum | The greatest number in a set of numbers |
| Mode | The value that occurs most often |
| Median | The middle value in a set of numbers |
| Range | The difference between the greatest and least values in a set of data |
| Magnitude Estimate | A rough estimate of the size of a numerical result |
| Reaction Time | the time it takes you to react to a stimulus |
| Estimation Challenge | to devise an estimation strategy to solve a problem for which finding an exact answer is impossible |
