Math and science students will appreciate the logical, accurate, and dependable HP SmartCalc 300s Scientific Calculator. Besides showing the result, the impressive Textbook Format Display (TFD) shows the math expression onscreen, just like it would appear on paper. Use the intuitive navigation pad to move around within an expression to change it and watch the result. With 249 built-in functions, students can solve an abundance of math problems from basic to complex Features Include Enter and see expressions as you would on paper Easily edit previous expressions 249 functions, to help solve your math problems from basic to complex Great for trigonometry, statistics and advanced mathematics Use the intuitive navigation pad to move around within the expression Smart and intuitive layout for easy learning HPs legendary heritage of accuracy and reliability