| Question | Answer |
| Decimal System | Base 10 system used in US |
| Decimal Point | Center of the decimal system |
| Whole Numbers | Numbers to the right of the decimal point |
| Place-value system | System where position determines the value based on the power of places of the system. |
| Trillions | Value placement 4 commas over. 1,000,000,000,000 |
| Billion | Value placement 3 commas over. 1,000,000,000 |
| Millions | Value placement 2 commas over. 1,000,000 |
| Thousands | Value placement 1 comma over. 1,000 |
| Units | Value place less then the first comma. 1 |
| and | The decimal in word problems |
| Approximate Numbers | Rounded numbers |
| Rounding all the way | Round to the left most digit |
| Addends | Numbers being added together |
| Sum, Total, or Amount | The solution to addition |
| Minuend | Top number in subtraction. |
| Subtrahend | Number you subtract from the Minuend |
| Difference | The solution of subtraction |
| Multiplicand | Top number in multiplication |
| Multiplier | Bottom number in multiplication |
| Product | Solution of multiplication |
| Partial Products | numbers between multiplier and the product |
| Dividend | The number being divided |
| Divisor | Number used to divide |
| Quotient | The solution of division |
| Partial Quotient | The solution of division not fully divided. |
| Remainder | Amount leftover in division |
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