Math tutorials
Clear, worked step-by-step guides to the math problems students search for most. Pick a topic, follow the examples, and solve your own with a photo.
ALGEBRA · 5 MIN READ How to solve quadratic equations, step by step Factoring, the quadratic formula, and completing the square, with worked examples. ALGEBRA · 6 MIN READ How to solve a system of linear equations, step by step Substitution and elimination, when to use each, and what no solution or infinitely many looks like. ALGEBRA · 5 MIN READ How to solve linear equations, step by step Isolating the variable, variables on both sides, and clearing fractions and parentheses. ARITHMETIC · 6 MIN READ How to add, subtract, multiply and divide fractions The rule for each of the four operations, common denominators, and how to simplify. ARITHMETIC · 5 MIN READ How to calculate percentages, step by step Percent of a number, what percent A is of B, and percent increase or decrease. ARITHMETIC · 5 MIN READ Order of operations (PEMDAS / BODMAS), explained The PEMDAS rule, worked examples with nesting, and the mistakes that change the answer.