CGP's KS2 Mental Arithmetic Targeted Question Book contains stacks of practice questions - all matched to the Year 5 curriculum. It also makes great prep for the 11+ exams.

This brilliant workbook covers a huge variety of questions to build pupils' maths skills. The book is split into three sections which get progressively trickier, so pupils can develop their abilities and grow in confidence as they work through the book. There are three sets of Progress Tests to help pupils keep track of how they're doing. And to top it all off, there are nine Listening Tests, and the audio is available online.

Plus there's no paying extra for answer books here! Full answers to every question (including the Listening Tests) are free online.