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Published byLester Dickerson Modified over 7 years ago

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Fractions

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Fractions Vocabulary Review fraction: improper fraction: mixed fraction:

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Prime Factorization breaking down a number into a product of its prime factors Example:400

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Greatest Common Factor find the prime factorization multiply the prime common factors Example:16080

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Least Common Multiple find the prime factorization find the GCF multiply the GCF by the leftover factors Example:96116

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Least Common Denominator uses the least common multiple of the denominators Example: What is the LCD for:

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Ordering Fractions can do this two ways: order by getting a common denominator, then compare numerators order by converting to decimals BE SURE: to read the question carefully, so you’re ordering from least to greatest, or greatest to least!!!

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Examples Order the fractions from greatest to least:

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Examples If a > b, and a and b are positive integers, then which expression is greatest:

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Adding/Subtracting Fractions must have common denominators adding mixed numbers: –add fractions first –add whole numbers –reduce the fraction, if needed subtracting mixed numbers: –subtract fractions first, borrowing if needed –subtract whole numbers –reduce the fraction, if needed

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Examples Find the sum or difference:

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Examples Find the sum or difference:

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Multiplying/Dividing Fractions multiplying fractions: –multiply numerators –multiply denominators –reduce, if needed dividing fractions: –flip the second fraction –multiply the fractions –reduce, if needed mixed numbers: –change into improper fractions

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Examples Find the product or quotient:

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Homework Orange Book: p. 31: 1-6 p. 36: 1-8 Purple Book: p. 19-20: 1-19

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