Download First Quarter Essential Mathematics Vocabulary

Carson City School District: CCSS Essential Math Vocabulary
2014-2015
Grade 3 In order for children to be successful this year in mathematics it is important that they have a clear
understanding of the following mathematics vocabulary. These definitions are grade level appropriate.
First Quarter Essential Mathematics Vocabulary
Word
commutative
property*
Picture/Example
a+b=b+a
axb=bxa
commutative.)
6÷3=2
divide*
dividend
divisor
expression*
Grouping a number into equal parts
The number that is being divided
6÷3=2
dividend
The number by which another number is divided
6÷3=2
divisor
4x5
8-1+4
12 x 2 = 24
equation*
10 = 6 + 4
3 x 4 = 12
factors
Definition
In addition and multiplication, changing the order
does not change the answer. (Subtraction & division are not
factor x factor = product
A statement of a mathematical operation(s) but has
no equal sign.
A mathematical statement containing an equal sign
to show that two expressions are equal
A whole number that multiplies with another
number to create a product. A factor can also divide
evenly into another number.
1,2,3,4,6, and 12 are all factors of 12.
multiples
multiply
4, 8, 12, 16, 20, 24, 28 … (Multiples of 4)
2, 4, 6, 8, 10 … (Multiples of 2)
2+2+2+2+2 =
5x2
quotient
round
A mathematical operation when a number is added
to itself a number of times.
A line with numbers marked in equal units used to
show an increase or decrease. (Same as a number line)
number line
diagram
product
A number added to itself a number of times
4 x 5 = 20
The result when two numbers are multiplied.
product
20 ÷ 10 = 2
quotient
12 may be rounded to 10
37 may be rounded to 40
1 inch represents 1 mile
scale
1” = 1 mi.
*Some words may not be assessed in the designated grade.
The result of a number being divided by another
number
Changing a number to a value that is close to the
number and easier to use
On a map, a ratio that compares the dimension on the
map with the actual distance it represents.
Carson City School District: CCSS Essential Math Vocabulary
2014-2015
Grade 3 In order for children to be successful this year in mathematics it is important that they have a clear
understanding of the following mathematics vocabulary. These definitions are grade level appropriate.
First Quarter Essential Mathematics Vocabulary
Word
Picture/Example
scaled picture
graph
Definition
A graph using pictures to represent quantities.
The scale illustrates what the number each picture
represents.
A graph using bars to represent quantities.
The scale illustrates what the numbers represent.
scaled bar
graph
A letter that represents some number.
variable*
n+5=9
*Some words may not be assessed in the designated grade.
Carson City School District: CCSS Essential Math Vocabulary
2014-2015
Grade 3 In order for children to be successful this year in mathematics it is important that they have a clear
understanding of the following mathematics vocabulary. These definitions are grade level appropriate.
Second Quarter Essential Mathematics Vocabulary
Word
associative
property*
Picture/Example
(a + b) + c = a + (b + c)
or
(a x b) x c = a x (b x c)
When adding or multiplying, the answer does not
change if the grouping changes.
(Subtraction and division do not have the associative property.)
A line segment connecting two non-consecutive
vertices.
diagonal line*
fraction
Definition
4
5
Part of a group, number, or whole. Written with a
numerator and denominator
A line parallel to the horizon
horizontal line
A line perpendicular to the horizon
vertical line
Distance between two points;
interval
Or amount of time between events.
minute (min.)
A unit used to measure time;
1 minute = 60 seconds;
60 minutes = 1 hour.
numerator
2 numerator
3
1
4 denominator
denominator
A unit to measure length might be one inch.
unit
Number of equal parts of the whole; number above
the line in a fraction.
Number of equal parts that the whole is divided into;
number below the line in a fraction.
Another name for one. The unit for measuring length
may be an inch; the unit for measuring weight may be
a pound; the unit for temperature may be a degree.
Any fraction with a numerator of one
unit fraction
1
4
*Some words may not be assessed in the designated grade.
Carson City School District: CCSS Essential Math Vocabulary
2014-2015
Grade 3 In order for children to be successful this year in mathematics it is important that they have a clear
understanding of the following mathematics vocabulary. These definitions are grade level appropriate.
Third – Fourth Quarter Essential Mathematics Vocabulary
Word
Picture/Example
Definition
The space a two-dimensional shape takes up
measured in square units
area
The area of this shape is 10 square units.
distributive
property*
compose*/
decompose
5 x (10 + 4) = (5 x 10) + (5 x 4)
456 can be decomposed as 456 = 400 + 50 + 6.
The product of a number and a sum is equal to the
sum of the individual products of the addends and
the number.
Decompose is the process of separating numbers
into their components (to divide a number into
smaller parts). Compose is putting them back
together.
Fractions having the same value
equivalent
fractions
1 = 2 = 3
2
4
6
Items weighing approximately 1 gram:
gram (g)
Metric unit for measuring mass;
the weight of 1 cc of water
Metric unit for measuring mass;
1 kg = 1000 g
kilogram (kg)
A liter is a little larger than a quart.
1 liter = 1000 ml
A metric unit for measuring liquid volume.
Liter (l)
The bowling ball has a greater mass than
the baseball.
Amount of matter in an object and a measure of the
force needed to accelerate it. (On the moon, where gravity is
much less than on earth, an object has a smaller weight than on earth but
identical mass. For practical purposes, on the earth, the measures of mass
Mass
Mass may be measured in
grams, kilograms, ounces, pounds.
Rules for the order in solving multi-step expressions
and weight will be about the same.)
order of
operation
(3+4)x(9–1)
*Some words may not be assessed in the designated grade.
Carson City School District: CCSS Essential Math Vocabulary
2014-2015
Grade 3 In order for children to be successful this year in mathematics it is important that they have a clear
understanding of the following mathematics vocabulary. These definitions are grade level appropriate.
Third – Fourth Quarter Essential Mathematics Vocabulary
Word
Picture/Example
Definition
Parallel lines are lines in the same plane that stay the
same distance apart, and they will never intersect.
parallel*
To break into smaller sections.
partition
8
perimeter
2
The total distance around the outside of a polygon
2
8
Perimeter = 20 units
Perpendicular lines are lines that intersect and form
at least one 90 degree angle.
perpendicular*
A closed two-dimensional shape.
plane figure
Two intersecting lines that form a 90 degree angle.
right angle*
A closed plane shape with three or more straight sides;
two dimensional.
polygon
A four-sided shape with four equal sides and equal
opposite angles
rhombus
square unit
a square with a given unit
of measure
A square inch, a square cm, a sq. mi., etc.
used to measure area of any two-dimensional shape
Liquid volume is the space a liquid takes up. (No difference
liquid volume
than volume, except that sometimes a volume is stated in liquid ounces
so as to differentiate between ounces, which is a unit of weight or mass.
For instance, 16 ounces is one pound, while 16 liquid ounces is one pint.)
*Some words may not be assessed in the designated grade.
Carson City School District: CCSS Essential Math Vocabulary
2014-2015
Grade 3 In order for children to be successful this year in mathematics it is important that they have a clear
understanding of the following mathematics vocabulary. These definitions are grade level appropriate.
Third – Fourth Quarter Essential Mathematics Vocabulary
Word
Picture/Example
Definition
The linear measurement of something from side to side,
usually being the shortest measurement.
width
*Some words may not be assessed in the designated grade.
Carson City School District: CCSS Essential Math Vocabulary
2014-2015
Grade 3 In order for children to be successful this year in mathematics it is important that they have a clear
understanding of the following mathematics vocabulary. These definitions are grade level appropriate.
*Some words may not be assessed in the designated grade.