Working with numbers in various contexts

Express and interpret a range of contexts using mathematical symbols, and find applications for numerical models;
Solve a range of everyday problems using estimation and calculations;
Verify and justify solutions within different contexts;
Perform operations on simple and complex numerical expressions;
Describe and compare counting systems from different cultures;
Critically analyse the development of the base ten number system;
Apply the relationship between rational and whole numbers;
Apply the relationship between rational numbers and integers.