Number Rounding Demonstration

This example demonstrates the process and effects of rounding numbers. It involves core mathematical concepts such as numerical approximation, rounding rules, function graphs, and interval concepts. Construction highlights include using commands like Point, Segment, Sequence, and objects like f (function), A, dp, text1, etc., for displaying results and parameters, with buttons for interaction, and variables like a, lb, ub for intervals, g, m for calculations, and B, xmax, xmin, list1 for data management. Suitable for middle school students and above to learn numerical processing methods, and also useful for teaching upper and lower sums/Riemann sums in calculus.