Divisibility Rules are shortcuts to use when dividing by single digit numbers (and 10). They are very helpful in determining factors for numbers. Factors are two numbers that are multiplied together to make a product.
Typically, factors are used to answer the following types of questions:
- Is a number prime or composite?
- What are ALL the factors of a number?
- What factors do these two numbers have in common?
- What is the Greatest Common Factor of two numbers?
To help my students find the factors of a number, I asked them to use the Divisibility Rules and a t-chart. To watch the process, please watch the video: Divisibility Rules and Factors.
Today was our note taking, we will work with finding factors tomorrow.
HOMEWORK: Countdown 1.4