Algebra and problem solving

In this lesson, we will investigate some number problems, especially focusing on the number 9, and the rules of divisibility by 9.

In this lesson, we will look at how different operations can affect the properties of a number. We will calculate a number of different operations using written worded instructions.

In this lesson, we will investigate the algebraic representations of odd and even numbers.

In this lesson, we will look at how we can use algebra to prove what happens to calculations with odd and even numbers.