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**even number Numbers ending in 0, 2, 4, 6, or 8.**

A number divisible by 2. Numbers ending in 0, 2, 4, 6, or 8.

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**A number NOT divisible by 2.**

odd number A number NOT divisible by 2. Numbers ending in 1, 3, 5, 7, 9.

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**also called the Grouping Property**

associative property of multiplication When three or more numbers are multiplied, the product is the same regardless of the grouping of the factors. (2 x 3) x 4 = 24 2 x (3 x 4) = 24 (2 x 4) x 3 = 24 also called the Grouping Property

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**The numbers added together**

addend The numbers added together to form a sum. = 15 sum

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**factors The numbers that are multiplied in a multiplication problem.**

3 x 5 = 15 product

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**sum difference product quotient**

the answer to an addition problem difference the answer to a subtraction problem product the answer to a multiplication problem quotient the answer to a division problem

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**commutative property of multiplication The property that states that**

changing the order of the factors does not affect the product. Example: 3 x 5 = and x 3 = 15

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**line A straight path that extends**

A straight path that extends in both directions without end; marked with an arrowhead at each end.

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**A piece of a line that has**

line segment A piece of a line that has two endpoints.

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parallel lines Two (or more) lines that run the same distance apart at every point and will never intersect. para el ll lines

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**A line with one end point that extends non-stop in the**

ray A line with one end point that extends non-stop in the opposite direction.

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**A shape formed by two rays that share an endpoint.**

angle A shape formed by two rays that share an endpoint.

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**vertex plural: vertices The point where:**

two or more rays share an endpoint. the edges of a solid figure meet. The point at the top of a cone.

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intersecting lines Two or more lines that meet or cross at a point.

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**Two lines that intersect**

perpendicular lines Two lines that intersect and form right angles.

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**Tool used to measure angles.**

protractor Tool used to measure angles.

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**1 rotation = 90° 2 rotations = 180° 3 rotations = 270°**

A full circle rotation is equal to 360° (degrees) When divided into four equal sections, each section is worth 90° 1 rotation = 90° 2 rotations = 180° 3 rotations = 270° 4 rotations = 360° 360° 90° 90° 90° 270° 90° 90° 90° 90° 90° 180°

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**An angle measuring 90 degrees.**

right angle An angle measuring 90 degrees.

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acute angle An angle that measures LESS than 90 degrees.

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obtuse angle An angle that measures MORE than 90 degrees.

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straight angle An angle that measures 180 degrees.

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**polygon four criteria for a A polygon**

is made up of all straight line segments is closed (has no breaks in the line segments) is 2-dimensitional has no lines that cross over each other

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**A polygon with all equal sides and all equal angles.**

regular polygon A polygon with all equal sides and all equal angles.

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**have all equal sides and**

irregular polygon A polygon that does NOT have all equal sides and equal angles.

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**rectangle A rectangle: four criteria of a is a quadrilateral.**

is a quadrilateral. is made up of four line segments. has four 90° angles. is a parallelogram – a four sided polygon with two pairs of parallel sides.

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**A quadrilateral (four sided polygon) with two pairs of parallel sides.**

parallelogram A quadrilateral (four sided polygon) with two pairs of parallel sides.

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**A quadrilateral (four sided polygon) with one pair of parallel sides.**

trapezoid A quadrilateral (four sided polygon) with one pair of parallel sides.

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**congruent Figures that have the same size AND same shape.**

The figures do not have be in the same position. If you placed the two shapes directly on top of each other they would match up perfectly.

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similar Figures that have the same shape, but are not the same size.

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**line of symmetry The line that divides a figure in half**

so that both halves are exactly the same.

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**A triangle with all three**

equilateral triangle A triangle with all three sides of equal length. 3 in. 3 in. 3 in.

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**isosceles triangle A triangle with two sides that**

are equal and one that is not. 5 in. 5 in. 3 in.

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**A triangle with all sides that**

scalene triangle A triangle with all sides that are a different length. 8 in. 4 in. 9 in.

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**A triangle with at least**

right triangle A triangle with at least one right angle.

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triangle A polygon with 3 sides.

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quadrilateral A polygon with 4 sides.

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**quadrilateral A polygon with 4 sides. parallelograms trapezoids**

rhombus

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**A quadrilateral with two pairs of parallel sides and four equal sides.**

rhombus A quadrilateral with two pairs of parallel sides and four equal sides.

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pentagon A polygon with 5 sides.

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hexagon A polygon with 6 sides.

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octagon A polygon with 8 sides.

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decagon A polygon with 10 sides.

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**obtuse triangle A triangle having an obtuse angle.**

One of the angles of the triangle measures more than 90 degrees.

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**A triangle having three acute angles.**

acute triangle A triangle having three acute angles.

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Which months have 30 days? April June September November

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**Which months have 31 days? January March May July August October**

December

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**area The number of square units that can fit inside of a shape.**

To find the _______ , count the square units. area = 9 square units

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**perimeter The distance around the outside of a shape. perimeter**

To find the __________ , add the length of all the sides. perimeter 2 cm + 3 cm + 3 cm = 8 cm The perimeter of this figure is 8 centimeters.

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bar graph

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**A flat surface of a solid shape.**

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**The line where two surfaces of a 3-dimensional shape meet.**

edge The line where two surfaces of a 3-dimensional shape meet.

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**A corner where two or more straight lines meet on a**

vertex vertices (plural) A corner where two or more straight lines meet on a 3-dimenstional shape. vertex

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**The number below the bar in a fraction.**

denominator The number below the bar in a fraction. It tells the total number of equal parts or groups into which the whole or group has been divided.

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**The number above the bar in a fraction.**

numerator The number above the bar in a fraction. It tells how many of the equal parts of the whole or group are being considered.

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**volume Volume = Length x Width x Height V = L x W x H**

The amount of space a solid figure takes up. Volume = Length x Width x Height V = L x W x H The volume of this figure is 24 cubic units.

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square pyramid A 3-dimensional solid with a base that is a square and four faces that are triangles.

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**measuring temperature.**

Celsius The metric unit for measuring temperature.

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Fahrenheit Customary or standard unit for measuring temperature.

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standard form 2,394 A way to write numbers by using the digits 0-9.

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expanded form 241 =

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**two-hundred fifty-seven**

word form A way to write numbers by using words. two-hundred fifty-seven

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**Used on a pictograph to tell how many each picture stands for.**

key Used on a pictograph to tell how many each picture stands for.

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line plot

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**A graph that uses a line to show how something changes over time.**

line graph A graph that uses a line to show how something changes over time.

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**Number represented by a whole number and a fraction.**

mixed number Number represented by a whole number and a fraction. 3 5 8

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**A fraction in which the numerator is larger than**

fraction greater than one A fraction in which the numerator is larger than the denominator. 5 3

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**A solid figure with six faces**

rectangular prism A solid figure with six faces that are rectangles.

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**A metric unit for measuring mass.**

gram and kilogram A metric unit for measuring mass. 1,000 grams = 1 kilogram

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**1,000 The prefix kilo- is equal to kilometer = 1,000 meters**

kilogram = 1,000 grams

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**100 centi- The prefix is equal to century = 100 years**

100 centimeters = 1 meter

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**Metric units for measuring capacity.**

liter and milliliter Metric units for measuring capacity. 1,000 milliliters = 1 liter

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The prefix milli- is equal to 1,000

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**decimeter A metric unit for measuring length.**

A metric unit for measuring length. 10 centimeters = 1 decimeter A decimeter (dm) is about the width of an adult's hand.

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**ante meridiem a.m. The time of day starting at midnight**

a.m. The time of day starting at midnight and ending at noon. In Latin, ante meridiem means “before the midday.”

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post meridiem p.m. The time of day starting at noon and ending at midnight. In Latin, post meridiem means “after midday.”

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analog clock digital clock

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colon : The symbol used to separate the hour from the minutes on a digital clock.

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**array A model of multiplication that arranges objects in**

rows and columns.

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**The amount a container can hold.**

capacity The amount a container can hold. Customary cups pints quarts gallons

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**The amount a container can hold.**

capacity The amount a container can hold. Metric milliliters liters kiloliters

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**temperature Freezing Point of Water 32 degrees Fahrenheit 0 degrees**

Celsius Boiling Point of Water 212 degrees Fahrenheit 100 degrees Normal Body Temperature 98.6 degrees Fahrenheit 37 degrees

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**Place Value Chart , thousandths hundredths tenths ● hundred millions**

hundred thousands ten thousands thousands hundreds tens ones tenths hundredths thousandths decimals

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Example: 634,822 Standard Form: 634,822 Word Form: six hundred thirty-four thousand, eight hundred twenty-two Expanded Form: 600, , , = 634,822 What is the value of the underlined digit in the number 634,822 = 600,000 What place value does the underlined digit hold? = hundred thousands

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**Distributive Property of Multiplication**

The property that states that multiplying a sum by a number is the same as multiplying each addend by the number and then adding the products. break down the 8 into 5 + 3 7 x 8 5 + 3 (7 x 5) + (7 x 3) = 56 break down the 16 into 5 x 16 10 + 6 (5 x 10) + (5 x 6) = 80

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**Identity Property of Multiplication**

The property that states that the product of any number and 1 is that number. Examples: 5 × 1 = 5 248 x 1 = 248 1 × 8 = 8

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cube A three-dimensional shape with six congruent square faces.

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cone A three-dimensional, pointed shape that has a flat, round base.

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**3-dimensional object shaped like a can**

cylinder 3-dimensional object shaped like a can

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**Another word for information.**

data Another word for information. Information collected about people or things and can be represented in graph form.

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diagonal A line segment that connects two vertices of a polygon that are not next to each other.

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**inverse operations Opposite operations. addition and subtraction**

Operations that undo and check one another. addition and subtraction are inverse operations multiplication and division are inverse operations.

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