Polygons
A closed shape with straight sides.
Polygon
A tool used to show the distance between numbers or the location of fractions.
Number line.
The answer you get when you add two or more numbers together.
Sum
A number that cannot be divided into two equal whole numbers (it always has one left over).
Odd number.
Two shapes that are exactly the same size and the exact same shape.
Congruent.
Any polygon that has exactly four sides.
Quadrilateral
A tool used to show the distance between numbers or the location of fractions.
Unit fraction.
A model of equal rows and columns used to solve multiplication.
Array
The value of where a digit sits in a number, such as ones, tens, or hundreds.
Place Value.
An imaginary line that divides a shape into two mirror-image halves.
Line of symmetry.
A feature of a shape, like the number of sides or the types of angles.
Attributes.
The bottom number in a fraction that shows how many equal parts make the whole.
Denominator.
Sharing a large group into equal smaller groups.
Division.
A strategy for adding where you move an amount from one number to another to make them easier to add (e.g., $19 + 7$ becomes $20 + 6$).
Give and Take.
A group of numbers that are related, like 3, 6, 9, and 12.
Multiples.
A special quadrilateral with exactly one pair of parallel sides.
Trapezoid
The top number in a fraction that shows how many parts are being counted.
Numerator.
The numbers you multiply together. ____ x ____= Product.
Factors.
Writing a number to show the value of each digit (e.g., $300 + 40 + 2$).
Expanded form.
A math tool used to show data with "X" marks above a number line.
Line Plot.
A quadrilateral where both pairs of opposite sides are parallel.
Parallelogram
Two fractions that represent the exact same amount, even if the numbers are different.
Equivalent Fractions.
The answer to a division problem.
Quotient.
The Bridges strategy used to find the difference between two numbers by hopping along a number line.
Open Number Line.
A parallelogram with four equal sides (all sides are the same length).
Rhombus.