Focusing on consolidating multiplication and division and developing multi-step calculations with mixed operations, this book: reinforces previous experience of counting and place value; consolidates and develops facility with the four operations; and provides problems involving multi-step and mixed operations to extend the children's skills. The book is part of a series for teachers to help them to meet curriculum requirements to make children aware of the wide range of strategies available for mental calculation and improve the children's flexibility and quick recall of number facts. Each book provides information on the importance of mental maths and managing mental maths lessons, the range of strategies the children might choose from for counting and ordering numbers and for each of the operations, advice about appropriately sized numbers to use, and a selection of easily-adapted model activities for practice and discussion. Each book ends with a small number of photocopiable pages to support specific activities and a writing frame to facilitate self-evaluation.