Factors
Method
1. Set up your factor tree
2. Start with 1 and the number itself
3. Check if the number is a multiple of 2s, then 3s, then 4s etc.
4. When you reach the factor already on the right of a pair stop
Common factors
1. Write your factor trees for each number
2. Circle any numbers that are in both factor trees
How it could look in your book
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