IM Video Lessons: Unit 6 (click here for the Digital Student Book Link)
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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.
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Order of Operations
- PEMDAS (parentheses, exponents, multiplication/division (from left to right), addition/subtraction (from left to right)
- "Please Excuse My Dear Aunt Sally"
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Algebra Basics
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Factoring & Distributing Expressions
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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.
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Writing Expressions
- A numerical expression contains numbers and operations.
- An algebraic expression is almost exactly the same except it also contains variables.
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The Distributive Property
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Inequalities
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Independent and Dependent variables
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