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Factor	A number that multiplies with another to make a product (3 and 4 are factors of 12)		math-vocab-3-5
Product	The answer to a multiplication problem		math-vocab-3-5
Quotient	The answer to a division problem		math-vocab-3-5
Dividend	The number being divided (In 12 ÷ 3, it is 12)		math-vocab-3-5
Divisor	The number you divide by (In 12 ÷ 3, it is 3)		math-vocab-3-5
Remainder	What is left over after dividing		math-vocab-3-5
Multiple	What you get when you multiply a number by 1, 2, 3, ... (Multiples of 5: 5, 10, 15)		math-vocab-3-5
Prime number	A number greater than 1 with exactly two factors, 1 and itself		math-vocab-3-5
Composite number	A number with more than two factors		math-vocab-3-5
Array	Objects arranged in equal rows and columns		math-vocab-3-5
Equation	A math sentence with an equals sign		math-vocab-3-5
Expression	Numbers and operation signs with no equals sign (3 × 4 + 2)		math-vocab-3-5
Variable	A letter that stands for an unknown number		math-vocab-3-5
Numerator	The top number in a fraction; how many parts we have		math-vocab-3-5
Denominator	The bottom number in a fraction; how many equal parts in the whole		math-vocab-3-5
Equivalent fractions	Fractions that name the same amount (1/2 and 2/4)		math-vocab-3-5
Mixed number	A whole number and a fraction together (2 1/3)		math-vocab-3-5
Improper fraction	A fraction whose numerator is greater than or equal to its denominator (7/4)		math-vocab-3-5
Unit fraction	A fraction with 1 on top (1/5)		math-vocab-3-5
Simplest form	A fraction that cannot be made smaller; the top and bottom share no factor but 1		math-vocab-3-5
Decimal	A number written with a decimal point to show parts of a whole (0.75)		math-vocab-3-5
Decimal point	The dot that separates ones from tenths		math-vocab-3-5
Tenths	The first place right of the decimal point		math-vocab-3-5
Hundredths	The second place right of the decimal point		math-vocab-3-5
Round	Replace a number with a nearby number that is easier to use		math-vocab-3-5
Estimate	Find an answer that is close but not exact		math-vocab-3-5
Regroup	Trade between place values, such as 10 ones for 1 ten		math-vocab-3-5
Place value	The value of a digit based on where it sits in a number		math-vocab-3-5
Perimeter	The distance around a shape		math-vocab-3-5
Area	The amount of flat space inside a shape, in square units		math-vocab-3-5
Volume	The amount of space inside a solid, in cubic units		math-vocab-3-5
Capacity	How much a container can hold		math-vocab-3-5
Angle	Formed where two rays meet at a point		math-vocab-3-5
Right angle	An angle of exactly 90 degrees, like a square corner		math-vocab-3-5
Acute angle	An angle less than 90 degrees		math-vocab-3-5
Obtuse angle	An angle greater than 90 degrees and less than 180 degrees		math-vocab-3-5
Straight angle	An angle of exactly 180 degrees		math-vocab-3-5
Parallel lines	Lines that stay the same distance apart and never meet		math-vocab-3-5
Perpendicular lines	Lines that meet at a right angle		math-vocab-3-5
Intersecting lines	Lines that cross each other		math-vocab-3-5
Line segment	Part of a line with two endpoints		math-vocab-3-5
Ray	Part of a line with one endpoint that goes on forever in one direction		math-vocab-3-5
Point	An exact location with no size		math-vocab-3-5
Polygon	A closed flat shape made of straight sides		math-vocab-3-5
Quadrilateral	Any polygon with 4 sides		math-vocab-3-5
Pentagon	A polygon with 5 sides		math-vocab-3-5
Hexagon	A polygon with 6 sides		math-vocab-3-5
Octagon	A polygon with 8 sides		math-vocab-3-5
Symmetry	When a shape can be folded so both halves match exactly		math-vocab-3-5
Line of symmetry	The fold line that makes two matching halves		math-vocab-3-5
Congruent	Exactly the same size and shape		math-vocab-3-5
Face	A flat surface of a solid shape		math-vocab-3-5
Edge	Where two faces of a solid meet		math-vocab-3-5
Vertex	A corner point of a shape or solid; plural is vertices		math-vocab-3-5
Elapsed time	The amount of time that passes from start to end		math-vocab-3-5
Data	Facts or numbers collected to learn something		math-vocab-3-5
Bar graph	A graph that uses bars to compare amounts		math-vocab-3-5
Line plot	A number line with marks above it to show how often values occur		math-vocab-3-5
Pictograph	A graph that uses pictures to show data		math-vocab-3-5
Survey	Asking a group of people questions to collect data		math-vocab-3-5
Mean	The average: add all values and divide by how many there are		math-vocab-3-5
Median	The middle value when the data are in order		math-vocab-3-5
Mode	The value that appears most often		math-vocab-3-5
Range	The highest value minus the lowest value		math-vocab-3-5
Commutative property	You can swap the order of numbers when adding or multiplying (3 × 4 = 4 × 3)		math-vocab-3-5
Associative property	You can regroup numbers when adding or multiplying and get the same answer		math-vocab-3-5
Distributive property	Multiplying a sum equals multiplying each part and adding (3 × (4 + 2) = 3 × 4 + 3 × 2)		math-vocab-3-5
Identity property	Adding 0 or multiplying by 1 leaves a number unchanged		math-vocab-3-5
Inverse operations	Operations that undo each other (Addition and subtraction)		math-vocab-3-5
Ordered pair	Two numbers in parentheses that name a point on a grid ((3, 5))		math-vocab-3-5
Coordinate plane	A flat grid made by a horizontal and a vertical number line		math-vocab-3-5
Digit	One of the symbols 0 to 9		math-vocab-3-5
Compatible numbers	Numbers that are easy to compute with in your head		math-vocab-3-5
Unit	A fixed amount used to measure, like an inch or a gram		math-vocab-3-5
Weight	How heavy something is		math-vocab-3-5
Mass	The amount of matter in an object		math-vocab-3-5
Fraction	A number that names equal parts of a whole		math-vocab-3-5