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Math Properties (revised 9/13)

AB
5 + 2 = 2 + 5Commutative Property of Addition
11 • 6 = 6 • 11Commutative Property of Multiplication
a + b = b + aCommutative Property of Addition
a • b = b • aCommutative Property of Multiplication
5•(3 + 4) = (5 • 3) + (5 • 4)Distributive Property
6 + 0 = 6Identity Property of Addition
7 • 1 = 7Identity Property of Multiplication
9 • 0 = 0Zero Property
(3 + 2) + 5 = 3 + (2 + 5)Associative Property of Addition
(3 • 2) • 5 = 3 • (2 • 5)Associative Property of Multiplication
Commutative PropertyChanging the order of the terms does not change the answer
Associative PropertyRe-Grouping the terms does not change the answer
Identity Property of AdditionAdding 0 to a number does not change the number
Identity Property of MultiplicationMultiplying a number by 1 does not change the number
Zero Property0 time any number equals 0
Inverse Property of Addition3 + (-3) = 0
Inverse Property of Addition-a + a = 0
Inverse Property of AdditonAny number plus its opposite equals the number
Inverse Property of Multiplication4/3 • 3/4 = 1
Inverse Property of Multiplicationa • 1/a = 1
Inverse Property of MultiplicationAny number times its reciprocal equals 1
Equality PropertiesWhatever you do to one side of the equation you MUST do to the other


Middle School Strategies
Holy Innocents' Episcopal School
GA

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