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Multiply

Distributive property.

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First you need to multiply the number in front of the parenthesis by the first number in the parenthesis and then bring it down. Next you multiply the number on the outside by the second number of the inside of the parenthesis and bring it down and so on. Once you are done with all the multiplication, do your like terms and such. Then you are done.
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The Order of Operations

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Please Excuse My Dear Aunt Sally. ( Parenthesis, Exponents, Multiply, Divide, Add, Subtract )

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How to add fractions easilly

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My Pre-Cal teacher taught us this. When you are trying to add fractions during a sine or cosine problem, or something that has to do with a unit circle or a triangle, use this: Ex: 1/4 + 3/5 Multiply 5*1, multiply 4*3 and add them for the numberator, and multiply 4*5 for the denominator. So it would be 5+12/20. 17/20. You multiply the denominator of one and numerator of other by the denominator of other and numerator of one.Then add. That will give you the numerator. Then the denomnator you multiply both denominators and add.
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