Learn a concept, then practise it.
Adding and subtracting integers
Add and subtract positive and negative numbers, using a number line.
Multiplying and dividing integers
The sign rules for multiplying and dividing negative numbers.
Lowest common multiples
Find the lowest number that is a multiple of two numbers.
Highest common factors
Find the largest number that divides into two numbers exactly.
Tests for divisibility
Quick checks for dividing by 2, 3, 4, 5, 6, 7, 8, 9, 10 and 11.
Square roots and cube roots
Square and cube numbers, and finding their roots.