Math in Focus Vocabulary
Third Grade
Chapter
1
Word
word form
1
1
standard form
digit
1
1
1
1
1
1
1
place-value chart/ placevalue strip
expanded form
greater than (>)
less than (<)
least
greatest
rule
1
number line
2
2
2
rounded
estimate
reasonable
2
2
2
overestimate
leading digit
front-end estimation
3
3
sum
regroup
4
4
difference
regroup
5
5
5
sum
difference
bar model
6
6
skip
dot paper
Definition
two thousand, four hundred seventy-eight is the word
form of 2,478
2,478 is the standard form of 2,478
A number is made up of digits
In the number 2,478, the digits are 2, 4, 7, and 8
a table or grid showing the place value of each digit in a
number
2,000 + 400+70 +8 is the expanded form of 2,478
representing a larger quantity 2,000 > 1,000
representing a small quantity 1,000 < 2,000
representing the smallest quantity
representing the highest quantity
an operation that relates consecutive numbers in a
number line or sequence
2,476 is 2,500 when rounded to the nearest hundred
a number close to the exact number
an estimated answer is reasonable when it is close to the
actual answer
an estimated answer that is greater than the actual sum
the digit in a given number with the greatest place value
estimation that uses the leading digits to estimate the
sum and difference
the answer in an addition problem
to use place value to change 10 ones into 1 ten, 10 tens
into 1 hundred, 10 hundreds into 1 thousand, and so on,
or vice versa
the answer in a subtraction problem
to use place value to change 10 ones into 1 ten, 10 tens
into 1 hundred, 10 hundreds into 1 thousands, and so
on, and vice versa
the answer in an addition problem
the answer in a subtraction problem
a model made of horizontal bars used to represent parts
and wholes in a problem
jump over
paper with dots arranged equally apart
This is dot paper it shows 3 rows of 2
6
number line
6
6
6
6
7
8
8
Commutative Property of
Multiplication
Associative Property of
Multiplication
Multiplicative Property of
One
Multiplicative Property of
Zero
array model
area model
equal groups
product
quotient
remainder
8
even numbers
8
odd numbers
9
9
11
twice
double
meter
11
11
centimeter
kilometer
11
11
distance
kilogram
11
11
gram
liter
11
milliliter
11
11
13
13
13
13
volume
capacity
vertical
horizontal
axis
scale
13
line plot
6
6
6
changing the order of numbers in a multiplication
sentence does not change the answer
changing the way numbers in a multiplication sentence
are grouped and multiplied does not change the answer
any number multiplied by 1 equals that number
any number multiplied by 0 equals 0
dots on paper arranged in rows and columns
identical small squares on paper arranged in a grid
sets that have the same number of items
the answer to a multiplication problem
A quotient is the answer in a division problem
A remainder is the number left over when a number
cannot be divided equally
When an even number is divided by 2, there is no
remainder. Even numbers have 0, 2, 4, 6, or 8 in the ones
place
When an odd number is divided by 2 there is a
remainder of 1. Odd numbers have 1, 3, 5, 7, or 9 in the
ones place
two times
two times
metric unit of length used to measure longer objects
1m= 100 cm
metric unit of length used to measure shorter objects
metric unit of length used to measure lengths and
distances
1 km = 1,000m
length between one place and another
metric unit of mass used to measure heavier objects
1kg = 1,000g
metric unit of mass used to measure lighter objects
metric unit of volume and capacity used to measure
greater amounts of liquid
1L = 1,000 mL
metric unit of volume and capacity used to measure
smaller amounts of liquid
amount of liquid in a container
amount of liquid that a container can hold
upright position
at a right angle to vertical parallel to ground level
grid lines that can be vertical or horizontal
numbers that run along the vertical axis of a graph that
show the value of the bar
a graphic representation in which markings above a
number line indicate the frequency of each value
13
survey
14
14
14
whole
equal parts
numerator
14
denominator
14
equivalent fractions
14
number line
14
simplest form
15
15
15
15
inch ( in.)
half inch
foot (ft)
yard (yd)
15
15
15
15
15
15
quarter inch
three quarter inch
mile (mi)
ounce (oz)
pound (lb)
ton (T)
16
16
16
16
16
hour
past
minutes
to
elapsed times
16
16
16
16
16
timeline
temperature
thermometer
degrees
Fahrenheit
a collection of facts, figures, or opinions gathered and
used to approximate or indicate what a complete
collection and analysis might reveal
complete and not divided
parts of a whole that are of equal size
a number that is above the line in a fraction. It shows the
number of shaded parts in a whole
a number that is below the line in a fraction. It shows the
number of equal parts into which the whole is divided
two or more fractions that name the same parts of the
whole
a line that shows numbers in increasing value from left
to right
an equivalent fraction whose numerator and
denominator cannot be divided by the same number (
other than one)
a customary unit for measuring short lengths
the halfway mark between two inch marks
a customary unit for measuring longer lengths
a customary unit for measuring long lengths and short
distances
one-fourth of an inch
three-fourths of an inch
a customary unit for measuring distance
a customary unit for measuring weight of light objects
a customary unit for measuring weight of heavy objects
a customary unit for measuring weight of very heavy
objects
a period of sixty minutes
time after the hour, 9:20 A.M. is 20 minutes past 9
one of the sixty parts an hour is divided into
time before the hour, 9:40 A.M. is 20 minutes to 10
amount of time that has passed between the start and
end of an activity
a visual representation to help you find elapsed time
a measure of how hot or cold something is
a tool used to measure temperature
a unit of measure used to measure temperature
a scale for measuring temperature
16
17
cold
point
a referent used to measure temperature
an exact location in space
17
line
a straight path that goes on without end in both
directions
17
endpoint
17
line segment
part of a line that has two endpoints
17
angle
formed when two line segments share the same
endpoint
17
right angle
17
greater than
17
less than
18
18
plane figure
open figure
18
18
closed figure
polygon
18
18
18
vertex
quadrilateral
parallel
18
18
rhombus
parallelogram
18
18
18
18
18
19
pentagon
octagon
tangram
slide
flip
area
a flat figure that can be open or closed
a plane figure that does not start and end at that same
point
a plane figure that starts and ends at the same point
a closed plane figure formed by three or more line
segments
a point where two sides of a polygon meet
polygon with four sides and four angles
refers to line that will not meet no matter how long they
are
a parallelogram with four sides that are of equal length
a quadrilateral with two pairs of opposite sides that are
parallel and of equal length
a polygon that has five sides
a polygon that has eight sides
a square that is made up of seven polygons
move a figure in any direction to a new position
turn a shape front to back over a line
the number of square units needed to cover the surface
of each figure without overlap
19
square units
19
square centimeter
units of area such as square centimeter, square inch,
square foot, or square meter
a metric unit of measure for smaller area
19
square inch
a customary unit of measure for small area
19
square meter
a metric unit of measure for large area
19
square foot
a customary unit of measure for large area
19
perimeter
distance around a figure that can be measured in linear
units