## Lesson 21-30 Vocab.

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berryman5  on November 11, 2009

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# Lesson 21-30 Vocab.

 Celsiusa scale used on some thermometers to measure temperature; metric scale.
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#### Definitions

Celsius a scale used on some thermometers to measure temperature; metric scale.
Fahrenheit a scale used on some thermometers to measure temperature; U.S. Standard scale.
Scale a type of number line used for measuring. Like a thermometer.
a.m. the period of time from midnight to just before noon.
p.m. a period of time from noon to just before midnight.
Common year a year with 365 days; not a leap year.
Leap year a year with 366 days; not a common year.
Decade a period of ten years.
Century a period of one hundred years.
Millennium a period of one thousand years.
Multiple a product of a counting number and another number.
Percent fraction whose denominator of 100 is expressed as a percent sign (%).
Associative property of addition the grouping of addends does not affect their sum.
Associative property of multiplication The grouping of factors does not affect their product.
Denominator the bottom number of a fraction; the number that tells how many parts are in a whole.
Fraction a number that names part of a whole.
Numerator the top number of a fraction; the number that tells how many parts of a whole are counted.
Remainder the amount left after division.
Operations of Arithmetic The four basic mathematical operations: addition, subtraction, multiplication, and division.
Parentheses a pair of symbols used to set apart parts of an expression so that those parts may be evaluated first: ( ).
Factor A whole number that divides another whole number with out a remainder.

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