Every Test is a Reading Test! STAR 5th gradeMath Vocabulary

Absolute Value :

Absolute Value The distance of a number from zero on a number line.

Acute Angle :

Acute Angle An angle measuring less than 90 degrees.

AREA :

AREA Of a rectangle or parallelogram:
LENGTH times HEIGHT
Of a triangle:
LENGTH times HEIGHT divided by two

Associative property :

Associative property The property that states that the way addends or factors are grouped does not change the answer.

Base :

Base A number used as a repeated factor.

Commutative Property :

Commutative Property The property that states that when the order of two or more addends or products is changed, the answer is the same

Composite Number :

Composite Number A whole number having two or more factors; a number that is NOT prime.

Congruent :

Congruent Having the same size and shape.

Coordinate Plane :

Coordinate Plane A plane formed by two intersecting and perpendicular number lines called axes.

Coordinates :

The numbers in an ordered pair. Coordinates

Cube :

Cube A solid figure with six congruent square faces.

Denominator :

Denominator The number below the bar in a fraction that tells how many equal parts are in the whole.

Diameter :

Diameter A line segment that passes through the center of a circle and has its endpoints on the circle/

DIFFERENCE :

DIFFERENCE The result of subtracting; the answer to a subtraction problem.

Distributive Property :

Distributive Property 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.

Equilateral Triangle :

Equilateral Triangle A triangle with three congruent sides.

Equivalent Fractions :

Equivalent Fractions Fractions that name the same amount.

Exponent :

Exponent A number that shows how many times the base is used as a factor.

Factor :

Factor A number that is multiplied by another number to find a product.

Factor Tree :

Factor Tree A diagram that shows the prime factors of a number or its PRIME FACTORIZATION.

Gallon :

Gallon A customary unit for measuring capacity.
Four Quarts = 1 Gallon
8 pints = 1 Gallon
16 cups = 1 Gallon

Gram :

Gram A metric unit for measuring mass.
1,000 milligrams = 1 gram
1,000 grams = 1 Kilogram

GCF (Greatest Common Factor) :

GCF (Greatest Common Factor) The greatest factor that two or more numbers have in common.

Intersecting Lines :

Intersecting Lines Lines that cross at exactly one point.

Isosceles Triangle :

Isosceles Triangle A triangle with two congruent or equal sides.

LCM (Least Common Multiple) :

LCM (Least Common Multiple) The smallest number, other than zero, that is a common multiple of two or more numbers

Line Symmetry :

Line Symmetry A figure has line symmetry if a line can separate the figure into two congruent parts.

mean :

mean A two-step process: adding all the numbers in a series, then diving the sum by the number of numbers.

median :

median After putting a series of numbers in number order, the number in the MIDDLE.

Mode :

Mode The number that repeats the MOST in a series of numbers.

Multiple :

Multiple The product of a given whole number and another whole number.

Number Line :

Number Line A line with equally spaced tick marks named by numbers.

Numerator :

Numerator The number above the bar in a fraction that tells how many equal parts of the whole are being considered.

Obtuse Angle :

Obtuse Angle An angle whose measure is greater than 90° and less than 180°

Ordered Pair :

Ordered Pair A pair of numbers used to locate a point on a coordinate plane; the first number tells how far to move on the X-axis and the second number tells how far to move on the Y-axis.

Order of Operations :

Order of Operations Rules for performing operations in expressions with more than one operation.

Ounce :

Ounce A customary unit for measuring weight.

Parallelogram :

Parallelogram A quadrilateral whose opposite sides are parallel and congruent.

Percent :

Percent The ratio of a number to 100.

PERIMETER :

PERIMETER The sum of all the sides of a shape.

Perpendicular Lines :

Perpendicular Lines Two lines that intersect to form four right angles.

Prime Number :

Prime Number A whole number greater than 1 that has exactly two factors, one and itself.

Probability :

Probability The likelihood that an event will happen.

Product :

Product The result of multiplying; the answer to a multiplication problem.

Quotient :

Quotient The result of dividing; the answer to a division problem.

Radius :

Radius A line segment with one endpoint at the center of a circle and the other endpoint on the circle. Radius = ½ Diameter

range :

range The difference between the BIGGEST and the SMALLEST numbers in a series of numbers.

Right Angle :

Right Angle An angle measuring EXACTLY 90 degrees.

Rounding :

Rounding Replacing a number with one that tells about how many.

Simplest Form :

Simplest Form A fraction is in simplest form when it has been reduced to its smallest form.

SUM :

SUM The result of adding; the answer to an addition problem.

Volume :

Volume Multiplying HEIGHT times WIDTH times DEPTH to measure of the amount of space a solid figure occupies.

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