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# Math Lexicon 3

TermDefinition
Expression Numbers, symbols and variables grouped together that show the value of something. It does not have an equal sign. Example: 2 x 3 is an expression
Variable It is the unknown value that you are missing and are trying to find. It is represented by a letter in a number sentence or mathematical expression.
Dividend It is the whole that is being divided into equal groups
Divisor The number you divide by; It is the number of equal groups that you need to make. Example: dividend ÷ divisor = quotient
Quotient The answer to a division problem. The quotient can just be a whole number, or a whole number and a remainder.
Remainder The part that is left over when you cannot divide any more.
Divisible When one number can be divided by another and the result is an exact whole number with nothing left over...no remainder!
Inverse Operation Opposite operations that will ‘undo’ each other. Example: addition and subtraction are inverse or opposite operations and multiplication and division are inverse operations.
Input/Output Table or Function Table These tables give pairs of numbers that follow a certain pattern or rule. You must find the rule that when applied to the input results in the output.
Rule A numerical expression that describes the relationship between pairs of numbers in an input/output table. A rule tells what operation to perform on the input so that the result of the computation is the output.
Area The number of square units that are needed to cover the inside of a figure. The formula for finding area of a rectangle or square is: A = Length X Width or A = l x w
Perimeter The distance around the outside of a figure. The formula for finding area of a rectangle or square is: P = l + w + l + w or P = 2l + 2w
Formula A special type of equation that shows the relationship between different variables. Example: Formula for finding Area is A = l x w
Strip Diagram A diagram or drawing that shows the relationship between the different parts of a problem. An equation can be written using a variable to represent the unknown value that we need to solve the problem.
Created by: emily.forehand