Units
All 9 units of Math 9. Each one has a concepts page to learn from, practice questions marked as you go, and quizzes built at random.
Unit 1
Unit 1: Square roots and surface area
Square roots of fractions and decimals, how to pin down √20 without a calculator, and the surface area of objects built from prisms and cylinders, where the hidden faces are the whole question.
Unit 2
Unit 2: Powers and exponent laws
What an exponent actually counts, why (−2)⁴ and −2⁴ are different numbers, the laws that save you multiplying everything out, and where powers sit in the order of operations.
Unit 3
Unit 3: Rational numbers
Fractions and decimals that can be negative: putting them in order, doing all four operations with them, and using them for temperatures, money and depths.
Unit 4
Unit 4: Linear relations
Turning a pattern into an equation, a table and a graph that all say the same thing, and using the relation to predict values inside the data and beyond it.
Unit 5
Unit 5: Polynomials
Terms, degree and like terms, modelled with algebra tiles; adding and subtracting polynomials, where the minus sign does most of the damage; and multiplying or dividing by a single term.
Unit 6
Unit 6: Linear equations and inequalities
Solving equations with brackets, fractions and variables on both sides, turning a word problem into an equation, and the one rule that makes inequalities different.
Unit 7
Unit 7: Similarity and transformations
Scale diagrams, what makes two shapes similar rather than just alike, and the two kinds of symmetry a shape can have.
Unit 8
Unit 8: Circle geometry
Four facts about circles — tangents, chords, and inscribed and central angles — and how to combine them with Pythagoras and the angle sum of a triangle.
Studying for the exam?
Mix every unit together
Build a random quiz drawn from all 108 questions across every unit, at the level you choose. It is the closest thing here to a real exam.