Functions Matheass5:The exercise app for negative numbers consists of 3 exercise variants.Exercise variant 1: addition and subtraction of negative integers.Exercise variant 2: Multiplication and division of negative whole numbers.Variants 1 and 2 have no time limit. Exercise variants 1 and 2 are finished when 20 task blocks each with 3 tasks have been solved correctly.Variant 3: the tasks come to addition, subtraction and multiplication. Time limit: 1.5 minutes.Each variant can also be selected individually via the menu.Everything is included in the ProfiMenu. It is over when at least 10 task blocks have been solved correctly in 90 seconds.