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Number and Algebra Foundations
Problem-solving strategies
The number system
Exponent laws
Scientific notation
Units and measurement
Radicals
Absolute value
Coordinate Geometry and Linear Modelling
Patterns and generalisations
Coordinate geometry basics
Linear equations
Systems of linear equations
Linear modelling
Functions and Quadratic Relationships
Relations vs functions
Quadratic expressions
Quadratic functions
Quadratic equations
Sets, Logic and Probability
Set notation
Venn diagrams
Single-event probability
Combined-event probability
Geometry of Shapes, Surface Area and Volume
Surface area
Volume
Geometric transformations
Statistical Measures and Data Representation
Univariate statistics
Describing and quantifying data
Histograms
Right Triangles and Circle Geometry
Right triangle geometry
Circle properties
Circle theorems
Sequences, Formulae and Proportional Reasoning
Sequences
Formula manipulation
Proportion
Sampling Methods and Bivariate Data
Sampling techniques
Bivariate data
Absolute error
If a quantity has true value $T$ and an estimate (or measured value) $A$, the absolute error is $|A-T|$.
For a real number $x$, the absolute value $|x|$ is its distance from $0$ on the number line.