### One Thousand and Eighty Nine

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

Skip navigation# Unit Overview: Algebra and problem solving

## Lessons:

### One Thousand and Eighty Nine

### Pick a number

### Odd or even?

### Algebraic Proof

4 lessons

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.

Units in Maths

- Numbers and numerals
- Axioms and arrays
- Factors and multiples
- Order of operations
- Positive and negative numbers
- Expressions, equations and inequalities
- Angles
- Classifying 2-D shapes
- Constructing triangles and quadrilaterals
- Coordinates
- Area of 2-D shapes
- Transforming 2-D figures
- Prime factor decomposition
- Conceptualising and comparing fractions
- Manipulating and calculating with fractions
- Ratio
- Percentages
- Different number systems
- Sequences
- Forming and solving equations
- Forming and solving inequalities
- Linear graphs
- Accuracy and estimation
- Algebra and problem solving
- Ratio (8.6a)
- Ratio, real life graphs, and rates of change
- Direct and indirect proportion
- Univariate data
- Bivariate data
- Famous maths problems
- Angles and parallel lines
- Angles in polygons
- Bearings
- Volume and surface area of prisms
- Area review
- Circles
- FDP review (9.1a)
- Probability
- Sets and Venn Diagrams
- Solving linear simultaneous equations algebraically
- Solving linear simultaneous equations graphically
- Angle review (9.5a)
- Constructions, congruence, and loci
- Pythagoras's theorem
- Famous maths problems
- Ratio review (9.7a)
- Similarity and enlargement
- Surds and trigonometry
- Quadratic expressions (9.9)
- Quadratic equations (9.10)
- Indices and standard form
- Growth and decay
- Finance