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1.
Addition/subtraction of fractions: Must have common denominator. Can use bowtie method: multiply denominators, bowtie numerators, then add the products in the numerator to get new numerator.

2.
Comparing fractions: You can compare fractions directly ONLY IF they have th same denominator. OR, the bowtie method. See page 97.

3.
Converting to fractions: When adding integers and fractions, it is easiest to convert the integer to a fraction. Example: 3.5 = 6/2. Then, you could add 6/2 and 7/2, or whatever fraction it may be.

4.
Data sufficiency: Be confident choices (A) or (B) are crossed off before considering to combine the statements in (C), (D), (E). DO NOT evaluate the statements together too early.

5.
Data sufficiency: On a yes/no problem, if the statment answers the question in either the affirmative or the negative, it is sufficient. "Maybe" = INSUFFICIENT.

6.
Data sufficiency AD: If first statement is sufficient, answer is A or D. If second statement is SUFFICIENT, answer is D. If second statement is INSUFFICIENT, answer is A.

7.
Data sufficiency BCE: If first statement is insufficient, answer is BCE. If second statement is sufficient, answer is B. If secone statement is insufficient, answer is C or E. If both statements are sufficient TOGETHER, answer is C. If statements TOGETHER are not sufficient, answer is E.

8.
Division of fractions: multiply by reciprocal

9.
Fraction: Part/Whole. Part over whole.

10.
Multiplication of fractions: multiply straight across

11.
Order of operation: PEMDAS. Please Excuse My Dear Aunt Sally

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