One of five textbooks for use in school and at home. Each left-hand page shows methods with worked examples. The corresponding right-hand page gives questions for the student to try. Topics covered include: factors, including prime factors, HCF and LCM; squares, square roots and cubes; unitary (units and quantities); ratio; linear measurement; approximation and estimation; decimal places and significant figures; standard form; plane figures, including perimeter and area; solids, including nets; and volume of prism.