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Chapter 2 Vocab
| Term | Definition |
|---|---|
| Approximate | Close in value or amount but not precise |
| Decimal | A fraction whose denominator is a power of ten and whose numerator is expressed by digits placed to the right of a decimal point |
| Decimal Point | The period that separates the whole from the parts (whole.parts) |
| Denominator | The bottom number of a fraction that tells how many EQUAL pieces are needed to make a whole |
| Difference | The result when one number is subtracted from another OR how two amounts are not equal |
| Dividend | A quantity to be shared, divided or equally parted out |
| Divisor | The number of equal shares or size of each group to be taken from the whole |
| Equivalent Fraction | Equal in value |
| Estimate | Using compatible numbers or rounding then calculating. An estimate tells about how much or about how many |
| Evaluate | To determine the value |
| Exact | No rounding, no estimating, no unused digits, no remainster. PRECISE |
| Expression | A mathematical phrase without an equal sign |
| Fraction | A way of describing equal parts. AND An unfinished division |
| Hundredths | The digit 2 places to the right of the decimal. A very small amount |
| Improper Fraction | A numerator is greater than the denominator. And enough equal parts to fill at least one whole with some left over |
| Mixed Number | A way to show how many wholes and how many equal parts there are in all whole and extra/equal parts |
| Model | Picture showing how things work or compare |
| Multiplicative Inverses | A number and its reciprocal whose product = 1 |
| Numerator | The top number of a fraction. The numerator tells how many equal pieces you have |
| Overestimate | An estimate that is greater than the actual value of a problem |
| Parentheses | Used in mathematics as grouping symbols for operations. When simplifying an expression, the operations within the parentheses are performed first |
| Place Value | The value a digit has because of its place in a number |
| Portion | Part of something |
| Product | The answer to a multiplication problem |
| Proper Fraction | Not enough equal parts to fill one whole. And the numerator is less than the denominator |
| Quotient | The answer to a division problem. |
| Reasonable | Checked using another method; agrees with other facts |
| Reciprocal | One or two numbers whose product is 1 |
| Remainder | The part left over after division or subtraction |
| Simplest Form | The numerator and denominator have no common factors other than 1 |
| Sum | The answer to an addition problem |
| Tape Diagram | Tape diagrams, also called bar models, are pictoral representations of relationships using rectrangles |
| Tenths | The digit 1 place to the right of the decimal. A small amount |
| Thousandths | The digit 3 places to the right of the decimal. A very, very small amount |
| Times as many | Comparing using multiplication or division |
| Underestimate | An estimate that is less than the actual value of a problem |
| Unit Fraction | A fraction with a 1 in the numerator |
| Unknown number; Unknown value | The missing value |
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