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HP SmartCalc 300s Scientific Calculator...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. Math functions include Sign change, +, / , -, x, =, square root, %, fractions, mixed numerals, fraction to decimal conversion, sexagesimal (degree, minute, second), variables (A, B, C, D, X, Y), trigonomic, inverse trigonometric, exponential, logarithmic, powers, factorial (!), absolute value (Abs), random number, rounding, polar-rectangular conversions, permutation and combination.