Prime Factorisation: Six Factor Trees
Break 48, 50, 45, 62, 90 and 120 into prime factors using the blank factor trees. Compare different valid paths to the same result.
- Grades
- Grades 4–5
- Pages
- 1
- File type
- Subject
- Division, Multiplication and Division, Numbers, Math
- Resource types
- Worksheets
- Ontario expectations
- B2.6 — represent composite numbers as a product of their prime…
From the author
About this resource
This worksheet is perfect for helping students practice their prime factorization skills! By creating factor trees, they will be able to see the different ways to break down a number into its prime factors. This is a great way for them to visualize and understand this important concept.
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In the classroom
Teaching tips & learning objectives
Learning objectives
- Break a whole number down into its prime factors using a factor tree
- Apply the same factorization method consistently across numbers of varying size (two-digit to 120)
Teaching tips
- Model one factor tree before students begin.
- Compare different valid starting pairs where available, and check that they lead to the same prime factorization.
Skills covered
- Prime factorization — students break down six numbers, from 45 up to 120, into their prime factors.
- Factor-tree method — students use a blank tree diagram to organize repeated division into prime factors.
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Ontario curriculum
Ontario curriculum expectations
Ontario expectations
Ontario expectations
- B2.6 — represent composite numbers as a product of their prime factors , including through the use of factor trees
Core concepts
Core concepts
- Prime factorization
- Factor trees
- Prime numbers
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