| A | B |
| Meter | The basic unit of length in the metric system |
| Place Value | a system for writing numbers in which the position of the digit determines its value |
| Clustering | A method used to estimate decimal sums and differences by rounding a group of closely related numbers to the same whole number |
| Millimeter | A metric unit of length equaling one-thousandth of a meter |
| Metric System | A base-ten system of weights and measures where the meter is the basic unit length, the gram is the basic unit of weight, and the liter is the basic unit capacity |
| Centimeter | A metric unit of length equaling one-hundredth of a meter |
| Equation | A mathematical sentence that contains the equal sign, = |
| Algebraic expression | A combination of variables, numbers, and at least one operation |