# Math vocabulary. Lessons 6-10Page 1

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Math vocabulary

Lessons 6-10

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Investigation 1

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## Fraction

Numbers that name parts of a whole

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## Denominator

The bottom number of a fraction

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## Numerator

The top number of a fraction

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## Endpoints

Points at which segments end

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## Line

A straight collection of points extending in opposite directions without end

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## Metric System

An international system of measurement based on multiples of ten

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## Ray

A part of a line that begins at a point and continues without end in one direction

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## Segment

A part of a line with two distinct endpoints

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## U.S. Customary System

A system of measurement used almost exclusively in the United States

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## Perimeter

The distance around a closed, flat shape

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## Counting Numbers

The numbers used to count; the members of the set (1,2,3,4,5…)

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## Negative Numbers

Numbers less than zero

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## Number Line

A line for representing and graphing numbers. Each point on the line corresponds to a number

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## Whole Numbers

The members of the set (0,1,2,3,4…)

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## Celsius scale

A scale used on some thermometers to measure temperature

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## Even Numbers

Numbers that can be divided by 2 without a remainder; members of the set (-4,-2,0,2,4)

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