Mathematics

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1. 1 Approximation and standard form In real measurements we round numbers. Exam questions ask for a given number of decimal places or significant figures. Notes 1 PDF
2. 2 Ratio, rate and proportion A ratio compares two or more quantities of the same kind. Simplify a ratio by dividing all parts by their HCF: 12 : 18 = 2 : 3. Notes 1 PDF

1. 3 Number bases We normally count in base 10 (denary). Computers use base 2 (binary). Other bases follow the same idea: each place value is a power of the base. Notes 1 PDF

1. 4 Sets and Venn diagrams A set is a well-defined collection of objects called elements. Notes 1 PDF

1. 5 Consumer arithmetic Consumer arithmetic is the maths of everyday money: buying, selling, saving and borrowing. Notes 1 PDF

1. 6 Algebraic expressions, formulae and indices Algebra uses letters to stand for numbers so that we can write general rules. Notes 1 PDF

1. 7 Equations and inequalities An equation is true for particular values of the unknown. Solving means finding those values. Notes 1 PDF
2. 8 Graphs, functions and variation Graphs show how one quantity changes with another. Notes 1 PDF

1. 9 Measures and mensuration Mensuration is the measurement of lengths, areas and volumes. Notes 1 PDF
2. 10 Geometry: angles, polygons, similarity and circles Use a ruler and compasses only: bisect lines and angles, and construct 60°, 90°, 45° and 30° angles. Leave construction arcs visible. Notes 1 PDF

1. 11 Statistics Statistics is about collecting, showing and interpreting data. Notes 1 PDF