Open Free Books https://openfreebooks.org/ Recent updates to Open Free Books pages and live chapters. Thu, 21 May 2026 06:54:29 GMT Laws of indices https://openfreebooks.org/math/laws-of-indices/ https://openfreebooks.org/math/laws-of-indices/ Thu, 21 May 2026 06:54:29 GMT Apply index laws to simplify expressions with integer and rational exponents. Linear inequalities in one unknown https://openfreebooks.org/math/linear-inequalities-one-unknown/ https://openfreebooks.org/math/linear-inequalities-one-unknown/ Thu, 21 May 2026 06:33:43 GMT Solve, represent, and apply linear inequalities in one unknown using number lines and interval notation. Counting and numbers https://openfreebooks.org/math/counting-and-numbers/ https://openfreebooks.org/math/counting-and-numbers/ Thu, 21 May 2026 05:05:38 GMT Count objects, spot patterns, add, multiply, and divide; then meet place value and big numbers from hundreds to billions. Linear equations in two unknowns https://openfreebooks.org/math/linear-equations-two-unknowns/ https://openfreebooks.org/math/linear-equations-two-unknowns/ Thu, 21 May 2026 05:05:38 GMT Solve pairs of linear equations by substitution, elimination, and graphs; classify unique, parallel, and coincident cases. Written calculation https://openfreebooks.org/math/written-calculation/ https://openfreebooks.org/math/written-calculation/ Thu, 21 May 2026 05:05:38 GMT Add, subtract, multiply, and divide whole numbers using vertical written form: align columns, regroup, and read the result. English https://openfreebooks.org/english/ https://openfreebooks.org/english/ Thu, 21 May 2026 02:10:55 GMT Browse English chapters in the curriculum catalog. 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Basic math notation https://openfreebooks.org/math/basic-math-notation/ https://openfreebooks.org/math/basic-math-notation/ Thu, 21 May 2026 01:07:39 GMT Learn the names and meanings of plus, minus, times, divide, equals, brackets, and other signs used in number sentences. Zero and one https://openfreebooks.org/math/zero-and-one/ https://openfreebooks.org/math/zero-and-one/ Thu, 21 May 2026 01:07:39 GMT 0 is nothing; 1 is one. Learn to tell them apart — the same skill as telling false from true — before counting larger amounts. Algebraic fractions & formulas https://openfreebooks.org/math/algebraic-fractions-formulas/ https://openfreebooks.org/math/algebraic-fractions-formulas/ Wed, 20 May 2026 20:17:25 GMT Simplify and combine algebraic fractions; rearrange formulas in science contexts. Directed numbers, rates & ratios https://openfreebooks.org/math/directed-numbers-rates/ https://openfreebooks.org/math/directed-numbers-rates/ Wed, 20 May 2026 20:17:25 GMT Operate with negative numbers and solve ratio, rate, and proportion problems in context. Polynomials: expansion & factorisation https://openfreebooks.org/math/polynomials-expansion-factorisation/ https://openfreebooks.org/math/polynomials-expansion-factorisation/ Wed, 20 May 2026 20:17:25 GMT Expand products, collect like terms, and factorise expressions using common factors and identities. Properties of operations https://openfreebooks.org/math/properties-of-operations/ https://openfreebooks.org/math/properties-of-operations/ Wed, 20 May 2026 20:17:25 GMT See why order, grouping, and distribution can change how you write a sum or product without changing the result — with interactive area and dot models. Quadratic equations https://openfreebooks.org/math/quadratic-equations/ https://openfreebooks.org/math/quadratic-equations/ Wed, 20 May 2026 20:17:25 GMT The discriminant, nature of roots, and the graph of y = ax² + bx + c. Search https://openfreebooks.org/search/ https://openfreebooks.org/search/ Tue, 19 May 2026 19:29:49 GMT Search Contribute https://openfreebooks.org/contributing/ https://openfreebooks.org/contributing/ Tue, 19 May 2026 12:34:25 GMT Contribute Mathematics https://openfreebooks.org/math/ https://openfreebooks.org/math/ Tue, 19 May 2026 10:55:50 GMT Browse mathematics chapters in the curriculum catalog. 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