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Determine if a Number is Prime or Composite

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Determine if a Number is Prime or Composite

TEKS Math: 5.4.A

(A) Identify prime and composite numbers

AU Math: ACMNA122

(Y6) Identify and describe properties of prime, composite, square and triangular numbers (ACMNA122)

CCSS Math: 4.OA.4

4.OA.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.

This number sense lesson focuses on determining if a number is prime or composite. The lesson includes research-based strategies and questions that help prepare students for assessments. In this lesson, students read the number. Then, they determine if it is composite or prime by trying to divide by either 2, 3, 5, or 7. Finally, students justify their answer. In addition to the lesson, there are eight pages of Independent Practice and Periodic Reviews with questions modeled after current adaptive testing items.

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Standard Alignments:

TEKS Math: 5.4.A

(A) Identify prime and composite numbers

AU Math: ACMNA122

(Y6) Identify and describe properties of prime, composite, square and triangular numbers (ACMNA122)

CCSS Math: 4.OA.4

4.OA.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.


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