This CGP Key Stage One Mental Maths Workout Book is packed with enjoyable practice exercises for Year 1 pupils (ages 5-6) - including a section of 'Time Yourself' tests. Presented in a fun and friendly style, it's a great way to help make sure children have really got to grips with working out maths problems in their heads. Answers are included in a removable section, so it's simple to find out how well they're progressing.