The EL531TH performs over 273 advanced scientific functions and utilizes a 2-line display and Multi-Line Playback to make scientific equations easier for students to solve. It is ideal for students studying general math, algebra, geometry, and trigonometry. In addition, it can be used for statistics, biology, chemistry, and general science. Hardcover protects from scratches.

Other functions include:
273 built-in functions
Entry System - Algebraic (D.A.L.)
1/x
x²
square root
Percentage (%)
Pi Key
Fractions
Multi-Line Playback
Last Answer Recall (ANS)
Memory Variables - 9
FSE Display (SCI, FIX, ENG)
3-Digit Punctuation
1-Variable Statistics
2-Variable Statistics
Regression Calculations - 6
Mean, Standard Deviation
nCr, nPr, n!
Random Numbers
Deg, Rad, Grad Modes
Sin, Cos, Tan, and Inverses
Hyperbolic Functions
Sexagesimal and Decimal Conversions
Rectangular and Polar Coordinates Conversions
Bin, Pen, Oct, Hex, Dec Number Systems
Logical Operation (AND, OR, NOT, NEG, XOR) Number Systems