Prime factorization is the key to finding factors. You can teach prime factorization through factor trees or the ladder method - - - or both!
• two-page factor tree worksheet
• two-page ladder method worksheet
Would you like ideas, links, and freebies for teaching kids to find factors of whole numbers between 1 and 100? Check out this week’s blog post on Enjoy Teaching
To launch your unit on factors, try Teaching Factors with Arrays
. Once your kids understand factors, use Finding Factors of Numbers 1-100 Cards, Sheets, and Venn Diagram
to fine-tune their skills.
Common Core State Standard 4.OA.B.4 - Find all factor pairs for a whole number in the range 1-100. Recognize that a whole number is a multiple of each of its factors. Determine whether a given whole number in the range 1-100 is a multiple of a given one-digit number. Determine whether a given whole number in the range 1-100 is prime or composite.