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3rd Grade Math Vocabulary
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Gravity
Terms in this set (44)
Expanded Notation
Writing a number to show the value of each digit. It is shown as a sum of each digit multiplied by its matching place value.
Number Line
A line marked with numbers, used to show operations.
Add, Addition
To join two or more numbers (or quantities) to get one number - (called the SUM of the total.)
Area
The size a surface takes up measured in square units. Formula- Length x width
Array
A set of objects or numbers arranged in rows and columns.
Attribute
A characteristic. For example shape, size, angles...
Base 10 blocks
Blocks which show base 10 number values.
Congruent
Having the same shape and the same size
Decrease
Get smaller in size or number
Denominator
The bottom number of a fraction. The number of parts the whole is divided into.
Difference
The answer or (difference) between two numbers - Subtraction
Division
Sharing or grouping a number into equal parts
Equivalent Fractions
Fractions having the same value or amount
Estimate
To make an approximate or rough calculation based on rounding
Face
The flat surface of a three-dimensional shape
Increase
Get larger in size or number.
Interval
Distance between two points. Amount of time between two events.
Context Clues
Key words within a word problem to help you solve.
Line Plot (or Dot Plot)
A number line showing a dot or mark over the position corresponding to each number
Line Segment
A section of a line
Multiplication
A mathematical operation where a number is added to itself a number of times.
Numerator
The number above the line of a fraction showing number of parts of the whole.
Numeral or Digit
Symbol used to represent a number
Order
Arrangement according to size, amount, or value
Parallel
Lines that are the same distance apart
Parallelogram
A quadrilateral with opposite sides that are parallel and of equal length and opposite angles that are equal.
Perimeter
The distance around the outside of a shape.
Place Value
The value of a digit depending on its place in a number.
Polygon
A plane shape having three or more straight lines.
Product
The answer or result when two numbers are multiplied.
Quadrilateral
A polygon with four sides.
Quotient
The answer or result from dividing one number by another.
Round
To change a number to a more convenient number.
Row
Items arranged in a horizontal line.
Table
Mathematical information organised in columns and rows.
Unit Fraction
A fraction with a numerator of 1
Value
What something is worth
Vertex
The place where 2 or more line segments come together.
X-axis
The horizontal axis of a graph.
Y-axis
The vertical axis of a graph.
Elapsed Time
The time that has passed while some event is occurring
Less than sign
When one value is smaller than another
Greater than sign
When one value is larger than another
Strip Diagram
A tool designed to model a mathematical problem
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