Iconic Mental Maths Workbook Grade 3 - Mental maths is one of the most important tools for LEARNING MATHEMATICS. It not only means to calculate quickly, but is a very useful life skill and a very important component of mathematics. ICONIC MENTAL MATHS LEARNER�S BOOK uses all the strategies recommended in the school syllabus and more, provides ample practice with a mental maths exercise for every day of the year, the exercises match the topics, pace and number ranges recommended in the syllabus.