| A | B |
| clustering | rounding numbers to the same value |
| front-end estimation | to use only the whole-number part of the decimal |
| difference | answer to a subtraction equatin |
| sum | answer to an addition equation |
| divisor | the number used to divide by |
| quotient | the answer to a division equation |
| equation | a mathematical statement that says two quantities aer equal |
| kilo | thousand in metric system |
| centi | hundredth in metric system |
| milli | thousandths in metric system |
| scientific notation | shorthand methd for writng large numbers like 3,456,000 |