Exponents
 Repeated Multiplication 3^4 = 3*3*3*3
 An exponent refers to the number of times a number is multiplied by itself. For example, 2 to the 3rd (written like this: 2^3) means: 2 x 2 x 2 = 8. 2^3 is not the same as 2 x 3 = 6. Remember that a number raised to the power of 1 is itself.


Order of Operations
 PEMDAS (parentheses, exponents, multiplication/division (from left to right), addition/subtraction (from left to right)
 "Please Excuse My Dear Aunt Sally"


Algebra Basics


Area and Perimeter
 To find the area of a rectangle multiply its height by its width. For a square you only need to find the length of one of the sides (as each side is the same length) and then multiply this by itself to find the area.
 The formula for AREA is Area= length x width x height
 The perimeter is the length of the outline of a shape. To find the perimeter of a polygon you have to add the lengths of all the sides.




Writing Expressions
 A numerical expression contains numbers and operations.
 An algebraic expression is almost exactly the same except it also contains variables.


The Distributive Property


Inequalities

