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Finding Factors of Numbers in 3 Ways

Using Number Tiles to Find Factor Pairs of Numbers

Using Prime Factor Circles to Find Factor Pairs of Numbers

Using Prime Factor Circles to Find All Factors of Numbers

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AuthorDavid Poras

Target Grades4 – 7

TagsArithmetic, Number Theory, Teaching Idea, Video

Common Core Standards3.OA.A.1Interpret products of whole numbers, e.g., interpret 5 × 7 as the total number of objects in 5 groups of 7 objects each. For example, , describe a context in which a total number of objects can be expressed as 5 × 7. • 4.OA.B.4Find 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. • 6.NS.B.4Find the greatest common factor of two whole numbers less than or equal to 100 and the least common multiple of two whole numbers less than or equal to 12. Use the distributive property to express a sum of two whole numbers 1–100 with a common factor as a multiple of a sum of two whole numbers with no common factor.