Valuta : 
First Mental Arithmetic provides carefully graded questions that develop children's essential mathematics skills. A downwards extension of the Schofield & Sims bestseller Mental Arithmetic the series comprises three workbooks for Year 1 (Books 1 to 3) and three for Year 2 (Books 4 to 6). The First Mental Arithmetic Answers book provides the correct answers to all the questions contained in the corresponding workbook. Answers to the Check-up tests are included together with the photocopiable Group record sheets and an additional photocopiable Check-up. All the Answers books contain: correct answers to all the questions contained in the corresponding workbook answers to the Check-ups photocopiable Group record sheets.