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Review Numbers & Money Exchange│ Unit111Where possible, we have included graphic illustrations, mind maps, tables and diagrams to assist the students in their learning. We have also highlighted the meaning of certain concepts through the use of specific symbols called icons. The purpose of these icons is to emphasize and draw their attention to important aspects of the work and to highlight the activities. The various icons have the following meanings:Book Aid This icon helps you identify and understand 1important concepts. Key concepts that need to be remembered.2Handy tips to make your work easier.3This icon indicates that you must perform an activity and complete it successfully before 4proceeding with the lesson.Suggested additional reading to comprehend 5the topic just studied.6Recommended links for students. Important PointsTipsClassActivityReadingInternetSearchingPractical questions solved to help understand 7the topic of the lesson.ExamplesDefinition