Lesson 5

Break-Apart Products

Est. Class Sessions: 2

Daily Practice and Problems

Teacher Notes
X

TIMS Bit

  1. 17 and 23

The only factors for both 17 and 23 are the numbers themselves and 1. Only one rectangle can be made for 17 and 23.

  1. 25: 1, 5, 25
    12: 1, 2, 3, 4, 6, 12

O. Factors and Primes

  1. Which of the following are prime numbers? Draw a circle around them. Explain how you know they are prime.
  1. 25
  2. 12
  3. 17
  4. 23



  1. Write all the factors for the numbers above that are not prime.