Mastering Math: Divisibility Tests

Mastering Math: Divisibility Tests

Learning Objective

Understand and apply tests for divisibility to enhance division skills.

What do you already know about divisibility tests?

What is Divisibility?

The ability to divide a number evenly without leaving a remainder.

Divisibility Test for 2

A number is divisible by 2 if it ends in 0, 2, 4, 6, or 8.

Divisibility Test for 3

A number is divisible by 3 if the sum of its digits is divisible by 3.

Divisibility Test for 4

A number is divisible by 4 if the number formed by its last two digits is divisible by 4.

Divisibility Test for 5

A number is divisible by 5 if it ends in 0 or 5.

Divisibility Test for 6

A number is divisible by 6 if it is divisible by both 2 and 3.

Divisibility Test for 9

A number is divisible by 9 if the sum of its digits is divisible by 9.

Divisibility Test for 10

A number is divisible by 10 if it ends in 0.

Practice Exercises

Solve a set of problems applying the divisibility tests.

Write down 3 things you learned in this lesson.

Have students enter three things they learned in this lesson. With this they can indicate their own learning efficiency of this lesson.

Write down 2 things you want to know more about.

Here, students enter two things they would like to know more about. This not only increases involvement, but also gives them more ownership.

Ask 1 question about something you haven't quite understood yet.

The students indicate here (in question form) with which part of the material they still have difficulty. For the teacher, this not only provides insight into the extent to which the students understand/master the material, but also a good starting point for the next lesson.