math vocabulary and definitions
Rational Number: A number that can be expressed as a ratio in fraction form.
examples: 1, -2, 1/4, -0.25
Equality: The condition of having the same value.
Graph: A pictorial device used to show a numerical relationship.
Equation: A statement that two mathematical expressions have the same value.
Addition: The operation of adding numbers.
Addend: Any number being added.
example: 6+4=10, 6 and 4 are addends
Divisor: The number by which another number is divided.
example: 21/3, 3 is the divisor
Multiply: Combine equal groups.
example: multiply 6 groups of 4 cars to get 24 cars
Perimeter: The distance around a figure
Multiplication: The operation of repeated addition of the same number.
example: 4 x 3 has the same value as 3+3+3+3
Operation: addition, subtraction, multiplication, division, and raising a number to a power are some mathematical operations.
Expression: A variable or combination of variables, numbers, and opertion symbols that represents a mathematical relationship.
> (is greater than)
> (is greater than) The number or expression to the left of the symbol has greater value than the number or expression tot he right of the symbol.
= (is equal to)
= (is equal to): The number or expression to the left of the symbol has the same value as the number or expression tot he right of the symbol.
Number Line: A diagram showing numbers as points on a line.
Sum: The result of addition.
example: 6+4=10, 10 is the sum
Dividend: A number that is divided by another.
example: 21/3=7, 21 is the dividend
Area: the measure, in square units, of the interior region of a 2-dimensional figure or the surface of a 3-dimensional figure.
Opposites: Numbers that are the same distance from zero in different directions on a number line.
example: 2 and -2 are opposites
order of operations
Order of Operations: Rules describing what sequence to use in evaluating expressions. Parentheses, exponents, multiply or divide left to right, add or subtract left to right.
< (is less than)
< (is less than): The number or expression to the left of the symbol has less value than the number or expressison to the right of the symbol.
Minus: A name for the subtraction symbol.
example: 26-3, we can say 26 minus 3
Subtract: take away a number (or quantity) from another number (or quantity).
Take Away: remove something
Divide: separate into equal groups and find the number in each group or the number of groups.
Square: a parallelogram with four congruent (equal) sides and four right (90 degree) angles
Solution: any value for a variable that makes an equation true
example: the solution of 2x=24 is x=12
Square Unit: a unit, such as a square centimeter or square inch, used to measure area.
Product: the result of multiplication.
example: 5x4=20, 20 is the product
Division: the operation of making equal groups and findign the number in each group or the number of groups.
Quotient: the result of division.
example: 21/3=7, 7 is the quotient
Mental Math: a way to calculate an exact answer without using paper and pencil or other physical aids.
Subtraction: the operation that gives the difference between two numbers.