triangle that has three acute angles -...
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Cobb County 4th Grade 1 2010-2011
Fourth Grade Vocabulary
acute angle
angle whose measure is greater than 0º and less than 90º
A
B C
acute triangle triangle that has
three acute angles
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Cobb County 4th Grade 2 2010-2011
area model
x 6
198
33
associative property
grouping numbers in different ways resulting with the same product or sum
(32 + 48) + 56 = 32 + (48 + 56)
angle
two rays or line segments that share the same endpoint
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Cobb County 4th Grade 3 2010-2011
36 + 48 + 52 = 36 + 52 + 48
two or more numbers added or multiplied in any order resulting in the same sum or
product
commutative property
method for locating points using a plane formed by two intersecting and perpendicular number lines called axes
coordinate system
cube rectangular prism with six
square faces
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Cobb County 4th Grade 4 2010-2011
cylinder
3-dimensional object with two parallel circular bases
data information gathered; facts or figures
from which conclusions are drawn
decimal
number with one or more digits to the right of the decimal point
3.57
3.3cyl
inder
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Cobb County 4th Grade 5 2010-2011
decimal point
symbol used to separate dollars and cents in money and the ones place from the
tenths place in decimals
3.57 $5.65
degree
unit used for measuring angles and temperatures
denominator
lower number of a fraction which tells how many parts are in the whole or in the group
3
5
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Cobb County 4th Grade 6 2010-2011
diagonal line
line segment joining two non-adjacent vertices of a
polygon
distributive property 25 x 43
(20 x 40) + (20 x 3) + (5 x 40) + (5 x 3)
3 X 8 + 3 X 4 = 3 X (8 + 4)
dividend
the number that is to be divided in a division problem
21 ÷ 7 = 3
21 ÷ 7 = 3
567
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Cobb County 4th Grade 7 2010-2011
divisor
7
the number that divides the dividend
21 ÷ 7 = 3
equilateral triangle
triangle that has 3 sides equal in length and 3 angles equal
in size
edges
line segments where two or more faces of a solid figure meet
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Cobb County 4th Grade 8 2010-2011
two or more fractions that name the same amount
equivalent fraction
=
estimate find out about how many or how
much 36 is about 40
evaluate
= 1 + 9
= 10
find the value of a mathematical expression
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Cobb County 4th Grade 9 2010-2011
expanded form
way to write numbers by showing the value of each digit
3000 + 400 + 20 + 7 = 3,427
expression + 23 – 14
mathematical phrase (part of the number sentence) that combines numbers and operation signs but does not have an equal sign (2+4)-5
face polygons that form flat surfaces
on a solid figure
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Cobb County 4th Grade 10 2010-2011
factor
s numbers that are multiplied together
to find a product
4 X 6 = 24
full rotation
360°movement of a figure around a fixed point
gram
metric unit for measuring weight (mass)
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Cobb County 4th Grade 11 2010-2011
half rotation
180°movement of a figure around a fixed point
1 100
hundredths
one hundred equal parts
37.76
improper fraction fraction in which the numerator is greater than or equal to the denominator
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Cobb County 4th Grade 12 2010-2011
interpret
give the meaning of or explain
isosceles triangle triangle with 2 sides equal in length
and 2 angles equal in size.
kilogram
metric unit for measuring weight (mass)
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Cobb County 4th Grade 13 2010-2011
like denominators fractions with denominators that
are the same 6 2
6 5
line straight path of points that has no
beginning or end
line graph graph that uses a line to show how data changes
over a period of time
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Cobb County 4th Grade 14 2010-2011
line plot
graph that uses symbols above a number line to represent data
median middle score (or scores) when a set of scores are written in order of size
3
3
4
6
7
line segment
part of a line that includes two endpoints
G A
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Cobb County 4th Grade 15 2010-2011
six places to the left of the ones place
million 3,000,000
mixed fraction
an amount given as a whole number
and a fraction 4
3
3
3
3
4
6
7
mode
the score that occurs most often in a set of scores
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Cobb County 4th Grade 16 2010-2011
net
flat pattern that can be used to make a three-dimensional object
numerator
the top number of a fraction, which tells how many parts are being counted out of the total number of equal parts
multiple number that is the product of a given number
and a whole number
7 X 8 = 56 56 is a multiple of 7 and also 8
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Cobb County 4th Grade 17 2010-2011
ordered pair pair of numbers used to locate a point on a coordinate grid
(2, 4)
obtuse angle angle whose measure
is greater than 90° and less than 180°
obtuse triangle
triangle that has one obtuse angle
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Cobb County 4th Grade 18 2010-2011
ounce standard unit for measuring weight
parallel
lines in the same plane that never intersect and are always the
same distance apart
parallelogram
quadrilateral whose opposite sides are parallel
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Cobb County 4th Grade 19 2010-2011
partial product
products when the ones, tens and hundreds are multiplied separately
38 X 9
54(6X9)
270(30X8)
324
perpendicular two lines or line segments that intersect to form right angles
graph that uses symbols to show data
pictograph
Key
= 2 cats
Sam
Sue
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Cobb County 4th Grade 20 2010-2011
place value value of a digit according to its place in a number 7,382 the value of 7 = 7,000
plane
flat surface that extends indefinitely in
all directions
plane figure two-dimensional shape
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Cobb County 4th Grade 21 2010-2011
polygon
closed plane figure formed by three
or more line segments and angles
point an exact location in
space
pound
customary unit of weight 1 lb = 16 oz
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Cobb County 4th Grade 22 2010-2011
product
name given to the answer in a multiplication problem
or or
proper fraction fraction where the numerator is less than
the denominator
prism
triangular prism
rectangular prism
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Cobb County 4th Grade 23 2010-2011
protractor tool for
measuring the size of an angle
pyramid has one base which gives the
pyramid its name, all other faces are triangles
quotient 28 ÷ 2 = 14
name given to the answer in a division problem
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Cobb County 4th Grade 24 2010-2011
ray line which has a definite starting
point but no end
range difference between the least and
greatest value in a set of data
2, 4, 5, 6, 7, 7, 8, 9, 10, 10, 11
9
rectangular prism
solid figure in which all six faces are rectangles
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Cobb County 4th Grade 25 2010-2011
rhombus parallelogram with all four sides
equal in length
remainder amount left over when a number cannot
be divided equally
43 ÷ 8 = 5 r 3
regular polygon
polygon with all sides and angles congruent
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Cobb County 4th Grade 26 2010-2011
angle which forms a square corner; has a measure of 90°
right angle
right triangle
triangle with one 90° angle
rotation
movement of a figure to a new position by turning it around a vertex or point of
rotation
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Cobb County 4th Grade 27 2010-2011
scalene triangle
triangle in which no sides are equal in length; no angles are equal in size
solid figure
3-dimensional figure
way to write numbers using the digits 0 - 9
352 4,672
standard form
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Cobb County 4th Grade 28 2010-2011
straight angle
angle that measures 180°
symbol
word, picture, or number used instead of words
+ = __
tenths 546.6
ten equal parts 1
10
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Cobb County 4th Grade 29 2010-2011
customary unit used to measure weight 1 T = 2,000 lbs
ton
trapezoid quadrilateral with exactly one
pair of parallel lines
trend changes in data over time
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Cobb County 4th Grade 30 2010-2011
Venn diagram uses circles to show relationships among sets
vertex/vertices
point at which 2 or more straight lines meet
weight
how heavy or light an object is in numbers
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Cobb County 4th Grade 31 2010-2011
x-axis horizontal line in a coordinate system
or on a coordinate plane
x
y y-axis vertical line in a coordinate system
or on a coordinate plane