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.

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

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

The numbers added together addend The numbers added together to form a sum.   7 + 8 = 15 sum

factors The numbers that are multiplied in a multiplication problem.   3 x 5 = 15 product

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

commutative property of multiplication The property that states that changing the order of the factors does not affect the product. Example: 3 x 5 = 15 and 5 x 3 = 15

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

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

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

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.

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

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.

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

Two lines that intersect perpendicular lines Two lines that intersect and form right angles.

Tool used to measure angles. protractor Tool used to measure angles.

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°

An angle measuring 90 degrees. right angle An angle measuring 90 degrees.

acute angle An angle that measures LESS than 90 degrees.

obtuse angle An angle that measures MORE than 90 degrees.

straight angle An angle that measures 180 degrees.

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

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

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

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.

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

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

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.

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

line of symmetry The line that divides a figure in half so that both halves are exactly the same.

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

isosceles triangle A triangle with two sides that are equal and one that is not. 5 in. 5 in. 3 in.

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

A triangle with at least right triangle A triangle with at least one right angle.

triangle A polygon with 3 sides.

quadrilateral A polygon with 4 sides.

quadrilateral A polygon with 4 sides. parallelograms trapezoids rhombus

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.

pentagon A polygon with 5 sides.

hexagon A polygon with 6 sides.

octagon A polygon with 8 sides.

decagon A polygon with 10 sides.

obtuse triangle A triangle having an obtuse angle. One of the angles of the triangle measures more than 90 degrees.

A triangle having three acute angles. acute triangle A triangle having three acute angles.

Which months have 30 days? April June September November

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

area The number of square units that can fit inside of a shape. To find the _______ , count the square units. area = 9 square units

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.

bar graph

A flat surface of a solid shape.

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

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

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.

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.

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.

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

measuring temperature. Celsius The metric unit for measuring temperature.

Fahrenheit Customary or standard unit for measuring temperature.

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

expanded form   241 = 200 + 40 + 1

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

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.

line plot

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.

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

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

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

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

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

100 centi- The prefix is equal to century = 100 years 100 centimeters = 1 meter

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

The prefix milli- is equal to 1,000

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.

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.”

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

analog clock digital clock

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

array A model of multiplication that arranges objects in rows and columns.

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

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

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

Place Value Chart , thousandths hundredths tenths ● hundred millions hundred thousands ten thousands thousands hundreds tens ones tenths hundredths thousandths   decimals

Example: 634,822 Standard Form: 634,822 Word Form: six hundred thirty-four thousand, eight hundred twenty-two Expanded Form: 600,000 + 30,000 + 4,000 + 800 + 20 + 2 = 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

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) 35 + 21 = 56 break down the 16 into 10 + 6 5 x 16 10 + 6 (5 x 10) + (5 x 6) 50 + 30 = 80

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

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

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

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

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

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

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.