Description

The EL-531TH scientific calculator contains 273 math functions and is intended primarily for high school students.
The clear 2-line display allows you to view and edit previous results, the hard plastic case protects the calculator from mechanical damage.

Basic Description
Display Type 2 lines
Number of Display Digits 10
Power Source Battery
Battery Type AAA x1
Automatic Power Down yes
Keys Plastic
Protective Case yes
Dimensions 161 x 80 x 15 mm
Weight 115 g
Mathematical Functions
Built-In Functions 273
Entry System Algebraic (D.A.L.)
1/x, x2, square root, % yes
Pi Key yes
GCD, LCM no
Quotient and Remainder Calculation no
Fractions yes
Function Table no
Equation Solver (Newton) no
System of Linear Equations no
Matrix and Vector Calculations no
Numeric Derivative and Integral no
Complex Number Calculation no
Training (DRILL) Function no
Memory
Multi-Line Playback yes
Last Answer Recall (ANS) yes
Memory Variables 9
Notation and Decimal Places
FSE Display (SCI, FIX, ENG) yes
3-Digit Punctuation yes
Statistics
1-Variable Statistics yes
2-Variable Statistics yes
Regression Calculations 6
Mean, Standard Deviation yes
nCr, nPr, n! yes
Random Numbers yes
Trigonometric Functions
Deg, Rad, Grad Modes yes
Sin, Cos, Tan, and Inverses yes
Hyperbolic Functions yes
Sexagesimal and Decimal Conversions yes
Rectangular and Polar Coordinates Conversions yes
Number Systems
Bin, Pen, Oct, Hex, Dec yes
Logical Operation (AND, OR, NOT, NEG, XOR) yes