greatest common factor and least common multiple · 1) list multiples 2) use prime factorization...
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Math 10 Name: Unit 1: Factoring (Day 1)
Greatest Common Factor and Least Common Multiple
Learning Intention(s):
Use factoring to determine GCF and LCM
Vocabulary:
1) Prime Factor
2) Prime Factorization
3) Greatest Common Factor
4) Least Common Multiple
Example 1: Determine the Prime Factors of a Whole Number
Method: Factor Tree – Write the Prime Factorization for 3300
Example 2: Greatest Common Factor of 138 and 198
Methods:
1) List factors
2) Circle common factors
3) Choose the greatest one, common to each
Method 2
Use Prime Factorization
Example 3: Least Common Multiple of 18, 20 and 30
Methods:
1) List Multiples
2) Use Prime Factorization
Example 4: Problem Solving Using GCF and LCM
a) What is the side length of the smallest square that could be tiled with rectangles that
measure 16 cm by 40cm?
b) What is the side length of the largest square that could be used to tile a rectangle that
measures 16 cm by 40 cm?
Homework: 1.2 # 5odd, 8-10odd, 12-15
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