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Math Properties

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PEMDAS
Order of Operations
zero property of addition
0+b=b
symmetric property
If x+y=3, then 3=x+y
reflexive property
x=x
identity property of multiplication
4x1=4
zero property of multiplication
0=0x12
substitution property
7(8-3)=7(5)
transitive property
If 6+3=9 and 9=3(3), then 6+3=3(3)
closure property
2+3 is a unique real number
associative property of addition
(3+5) + c= c + (3+5)
identity property of multiplication
(3x9) x1= 3x9
associative property of multiplication
6(4x3)= (4x3)6
density property
the rational number 19/24 is between 3/4 and 5/6
reciprocal property
3x1/3=1
opposite property
-5+5=0