
Factors of a Number
Presentation
•
Mathematics
•
9th - 10th Grade
•
Hard
Joseph Anderson
FREE Resource
8 Slides • 0 Questions
1
Prime Number, Factors, Multiple, HCF and LCM
presentation by Ms. Hall
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Objectives: Students should be able to
find the prime factors of numbers using repeated division or tree method.
calculate the HCF using the prime factorization method.
calculate the LCM using the prime factorization method.
Solve worded problems with LCM and HCF.
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Prime Numbers
Prime numbers are numbers that have only 2 factors: 1 and themselves.
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Prime factor can be found using:
Repeated Division
Factor Tree
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Repeated Division
Th is method of prime factorization is used to “break down” or express a given number as a product of prime numbers.
For example, the factors of 64 and 80 are as such:
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INDEX FORM
64 = 2×2×2×2×2=25
80 =2×2×2×5= 23 × 5
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Factor Tree
A factor tree shows the prime factors of a composite number in a "tree-like" form. For example, the factors for 72 are as such.
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INDEX FORM
72 = 2×2×2×3×3=23 × 32
Prime Number, Factors, Multiple, HCF and LCM
presentation by Ms. Hall
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