Reviewing The Greatest Common Factor

All About Factors

Formative Assessment

All About Factors

Read and Discuss

  • A factor of a number is a whole number that divides a given quantity without a remainder. For example, 5 is a factor of 10 but not a factor of 8.
  • Common factors are factors that are shared by two numbers. For example, 2 is a common factor of 4 and 8.
  • The greatest common factor of two numbers is the greatest number that is a factor of the two numbers. So, the greatest common factor of 4 and 8 is 4.
  • When you can exactly fit congruent squares along the edge of a rectangular grid, the side length of the square is a factor of the side length of the rectangular grid.

Hint:

Can you:

  • Describe the relationship between the side length of the square and the side lengths of the rectangular grid?
  • Identify what the largest square that exactly covers the rectangular grid represents?
  • Use the terms factor ,common factor , andgreatest common factor appropriately?