SK SSA Math 9 cheat sheet
SK SSA Math 9 · Keep the key ideas within reach.
Grade9 rational arithmetic and integer exponent laws
Parentheses can change the base and sign of a power.
Differentiate products of powers from sums of powers.
State nonzero conditions for zero/negative exponents and quotients.
Use structure, estimation and a direct arithmetic check.
Grade9 polynomials, linear relations and equations
Combine like terms only when variable parts match.
Distribute across every term and check a substitution.
Solve by preserving equality, including every denominator term.
Interpret rate and intercept with variables, units and model limits.
Grade9 circle properties, symmetry and spatial reasoning
Use actual geometric conditions rather than visual appearance.
Central and inscribed angle relationships require the same intercepted arc.
Check centers, tangency and corresponding parts.
Length and area scale differently; keep units consistent.
Grade9 sampling, data judgments and probability models
Define the target population and selection method.
Neutral wording matters as well as sample size.
Check distributions and outliers before choosing a summary.
State replacement, independence and equal-likelihood assumptions.