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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