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Fifth Grade

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Fifth Grade Math Vocabulary Diameter The distance across a circle through the center Any chord of a circle that passes through the center Examples Distributive ... – PowerPoint PPT presentation

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Title: Fifth Grade


1
Fifth Grade Math Vocabulary
2
Diameter
The distance across a circle through the center
Any chord of a circle that passes through the
center Examples
3
Distributive Property
A number multiplying a sum in parentheses
multiplies each number and then adds the
products It gives the same result as adding
first and then multiplying A property which
multiplies a single term with two or more terms
inside a set of parentheses Examples 3 x (4
2) (3 x 4) (3 x 2)
3(74)(3)(7)(3)(4) 10(218)(102)(1018)
4
Edges
A line segment where 2 faces of a 3-dimensional
figure meet Examples
             
5
Equation (Modeling)
A mathematical sentence that shows that two
quantities are equal To solve an equation,
find a value for the variable
that makes the sentence true
Examples
6
Expanded Form
Writing a number as the sum of the values of its
digits A way to write numbers by showing the
value of each digit Examples
935 900 30 5
1,579 1,000 500 70 9
7
Faces
A flat side of a 3-dimensional
figure Examples
8
Improper Fraction
A fraction whose numerator is greater than or
equal to its denominator Examples
9
Intersecting Lines
Lines that meet or cross at one common
point Examples
Lines EF and GH intersect at point P
The two lines intersect at point (-2,1)
10
Inverse Operations
Operations that undo each other Examples
Addition and subtraction are inverse
operations (undo adding 3
by subtracting 3) Multiplication
and division are inverse operations
(undo multiplying by 2 by dividing by
2) To solve an equation use inverse
operations x 3 5 x 3 3 5 3 x 2
11
Mean
One of the measures of central tendency It is
found by adding the numbers in a data set and
then dividing by the number of data
points Example Given six test
scores 85,87,78,88,88 and 96 The mean or
average is 87
12
Metric Units meter, liter, gram
Units developed in Europe and used in most of the
world Examples
   Quantity          Unit Equivalent        Symbol
      length         meter 3.28 feet           m
      mass         gram  33.8 fl ounces           g
     volume          liter .035 ounces            l
13
Millions
Examples
One million seconds 277.76 hours
One million pennies
14
Mixed Numbers
A number that combines both a whole number and a
fraction
15
Parallel Lines
Lines that never cross and are always the same
distance apart They have the same
slope Examples
16
Perpendicular Lines
Lines which intersect to form
a right (90 degree) angle Examples

17
Plane
A flat surface extending in all directions A
two-dimensional figure Examples
Coordinate Plane
18
Polygon regular/irregular
A closed plane figure for which all sides are
straight line segments Regular polygons have
congruent sides and angles
19
Proper Fraction
A fraction whose numerator is less than its
denominator Examples
20
Quadrilateral
21
Radius
A line segment that connects the center of the
circle to a point on the circle
Examples
22
Ray
A part of a line starting at a particular point,
its endpoint, that extends infinitely in one
direction Examples
An angle is made up of 2 rays
23
Standard Form
A way to write numbers by using the digits 0-9,
with each digit having a place value
Exponential form
Standard form
24
Thousandths
The place value that represents one thousandth
of a whole It is one tenth of a hundredth and
one hundredth of a tenth Examples
25
Types of triangles (isosceles,equilateral,scalene
)
A scalene triangle has no congruent sides An
isosceles triangle has two congruent sides An
equilateral triangle has all three sides
congruent Examples
Scalene
Equilateral
Isosceles
26
Types of triangles (right, acute, obtuse)
A right triangle has one right angle An acute
triangle has three acute angles An obtuse
triangle has one obtuse angle Examples
Acute triangle
Obtuse triangle
Right triangle
27
Variable
A quantity that can change or that may take on
different values Examples
x y
0 4
1 3
2 2
28
Vertex (or vertices)
A corner point of a geometric figure A point
where two sides of a polygon intersect Examples

29
x-axis, y-axis
The x-axis is the horizontal number line, the
y-axis is the vertical number line, They form a
plane used for graphing points and
lines Examples
y-axis
x-axis
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