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1.
Adjacent Angles: angles that share a common side and a common vertex

2.
Area: the number of square units needed to cover a figure

3.
Associative (grouping) Property: the order in which you add or multiply THREE OR MORE numbers does not change the outcome. Example: a+(b+c)=(a+b)+c

4.
Common Factor: a number that is a factor of two or more numbers

5.
Commutative (order) Property: the order in which you add or multiply two numbers does not change the outcome. Example: a**b=b**a

6.
Complementary Angles: two angles whose sum is equal to 90 degrees

7.
Composite Number: a whole number that is exactly divisible by more than two factors

8.
Congruent: figures that have the same size and shape

9.
Congruent Figures: figures that are exactly the same shape and size

10.
Denominator: the part of a fraction below the line, which tells how many equal parts there are in the whole

11.
Dependent Variable: the output (y) values or range

12.
Difference: the result of subtraction

13.
Distributive Property: the product of a number and the sum of two numbers is equal to the sum of the two products. Example: a**(b+c) = (a**b)+(a*c)

14.
Divisible: when you divide, the remainder is zero

15.
Equation: a mathematical sentence stating that two expressions are equal

16.
Equivalent: equal in value, but in a different form

17.
Equivalent Fractions: two or more fractions that represent the same number

18.
Estimate: to find an answer that is close to the exact answer

19.
Expanded Form: a way to write numbers that shows the value of each digit

20.
Exponent: a number that indicates how many times the base appears as a factor

21.
Exponential Form: a symbolic way of showing how many times a number is used as a factor

22.
Factor: one of two or more numbers or expressions that are multiplied to form a product

23.
Fraction: a number used to name a part of the group or part of a whole

24.
Greatest Common Factor (GCF): the greatest number that divides evenly into two or more numbers

25.
Improper Fraction: a fraction with its numerator equal to or greater than its denominator

26.
Independent Variable: the input (x) values or domain

27.
Integers: the set of numbers containing zero, the natural numbers, and their opposites

28.
Irrational Numbers: set of all numbers that cannot be expressed as the ratio of two integers

29.
Leading Digit: the digit farthest to the left, having the greatest value

30.
Least Common Multiple (LCM): the smallest number that is a common multiple of two or more numbers

31.
Like Fractions: fractions that have the same denominator

32.
Lowest Terms (or Simplest Form): when the numerator and denominator of a fraction have no common factors other than 1

33.
Mean: average; calculated by dividing the number of items in a set by the sum of those numbers

34.
Median: the MIDDLE number when the data is ordered from least to greatest

35.
Mixed Number: a number written as a whole number and a fraction

36.
Mode: the number(s) that occurs the MOST in a set of data

37.
Multiple: the product of that number and any whole number

38.
Natural Numbers: the counting numbers

39.
Number Line: a line with equal distances marked off to represent numbers

40.
Numerator: the number written above the fraction line that tells how many equal parts of the whole are being counted

41.
Perimeter: the distance around a figure

42.
Place Value: a system of numeration in which the value of a digit depends on its position in the numeral

43.
Prime Factorization: expressing a composite number as the product of its prime factors

44.
Prime Number: a whole number greater than one that has only two factors, 1 and itself

45.
Product: the result of multiplication

46.
Proper Fraction: a fraction whose numerator is less than its denominator

47.
Pythagorean Theorem: the square of the hypotenuse of a right triangle is equal to the sum of the square of the other two sides

48.
Quotient: the result of division

49.
Range: the difference between the greatest number and the least numbers in a set of data

50.
Ratio: a comparison of two numbers using division

51.
Rational Numbers: set of all numbers that can be written as the ratio of two integers with a non-zero denominator

52.
Real Numbers: set of all rational and irrational numbers

53.
Round: to estimate a number by replacing it with a number expressed to the nearest ten, hundred, thousand, and so on

54.
Similar Figures: two figures where the corresponding angles are congruent and the corresponding sides are proportional

55.
Simplify: to divide the numerator and denominator of a fraction by the greatest common factor

56.
Standard Form: a number written with one digit for each place value

57.
Sum: the result of addition

58.
Supplementary Angles: two angles whose sum is equal to 180 degrees

59.
Surface Area: the sum of the area of all faces of an object

60.
Term: each number in a sequence or pattern

61.
Unlike Fractions: fractions that have different denominators

62.
Variable: a symbol such as a box or a letter used to represent an unknown value

63.
Vertical Angles: two angles opposite one another that share a vertex

64.
Volume: the amount of cubic units needed to fill a three-dimensional object

65.
Whole Numbers: set of natural numbers and zero

## Middle School Math Vocabulary PracticeStudy online at quizlet.com/_2tfpd |

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