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Name: _______________________________ Math 3/24/11 Chapter 9 Chapter 9 Study Guide Common Factors are : _________________________________________ GCF-Greatest Common Factor: _______________________________________ How do you find common factors (what strategy do you use?) ______________ How do you find GCF (what strategy do you use?) ______________ Practice these two skills: Find the common factors for the numbers 6 and 8 Find the common factors for 9 and 27 Find the GCF of 12, 18 Find the GCF of 24, 36 Common Multiples: _______________________________________ LCM- Least Common Multiple: ________________________________ How do you find common multiples? _________________________________________ How do you find LCM? ____________________________________________________ Practice these two skills Find the first 3 common multiples of 6 and 8 Find the first 3 common multiples of 3 and 4 Find the LCM of 2 and 5 Find the LCM of 3 and 8 Comparing Fractions What symbols do you use when you are comparing fractions? _____ ______ or ______ What strategy do you use when you are comparing fractions? ____________________________ Practice this skill Compare these fractions: Equivalent Fractions What do you look for when you are trying to find equivalent fractions? ____________ What do you do when you are given one fraction and are asked to find 2 equivalent fractions? _____________________________________________________________ Practice these 2 skills: Find 2 equivalent fractions for each: Find the missing number Simplest Form: How do you find simplest form? ____________________________________________ Practice this skill Find the simplest form for these fractions: Prime or Composite? Prime Numbers are: _______________________________________________________ Write 2 examples:___________ __________ Composite Numbers are: ___________________________________________________ Write 2 examples: __________ __________________ Tell where each is Prime or Composite by writing a P or a C next to it Prime Factorization: What strategy do we use to find the prime factorizations (a string of prime numbers that multiply to equal that original number) ________________________________________ Practice this skill Find the Prime Factorization for these numbers: 12 27 80 Problem Solving: The only way to improve on problem solving is to practice. The price of apples at a farm market is shown below. How much will 12 apples cost? Number of Apples 3 6 9 12 Cost ($) $1.50 $3.00 $4.50 ? U: P: S: Mercedes makes 2 dozen cookies. She adds chocolate chips to 13 of the cookies and peanuts to 6 cookies. What fraction of the cookies does not have chocolate chips or peanuts? U: P: S:
