Number 1

Types of Number Numbers can be sorted into groups depending on their properties. Recognising which group a number belongs to is the first step in most number…

Set Notation and Venn Diagrams A set is just a collection of things, and set notation gives a precise way to describe a set and to combine two sets. A Venn…

Squares and Square Roots Squaring a number and taking a square root undo each other. Every positive number actually has two square roots, but the root symbol…

Fractions, Decimals and Percentages Fractions, decimals and percentages are three different ways of writing the same value. Being able to switch between them,…

Ordering Ordering means arranging quantities by size. The six comparison symbols give a precise way to state how two quantities relate, and the same ideas…

Order of Operations and Brackets When a calculation mixes several operations, the order they are carried out in changes the answer. A fixed set of rules - often…

Positive, Zero and Negative Indices An index (or power) tells you how many times a number is multiplied by itself. Extending the pattern of indices below zero,…

Standard Form Notation and Conversion Standard form is a compact way to write very large or very small numbers. Every number in standard form has exactly the…

Rounding to Decimal Places and Significant Figures Rounding replaces a number with a simpler one that is close to its actual value. Decimal places count digits…