It is hard to imagine an infant classroom where mental mathematics is not used every day. However, setting aside a regular time for mental mathematics ensures that children have plenty of experience and practice in this important area of the curriculum. This small book gives that practice, and encourages children to think about all aspects of number. As well as questions of recall and basic mental manipulation, there are problems to intrigue and fascinate children. This book is likely to be most useful for 6 to 7 year olds.