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Comparison – Three Generations of Casio fx-115

Casio fx-115D
Casio fx-115MS
Casio fx-115ES Plus

Casio fx-115D
Casio fx-115MS
Casio fx-115ES Plus
Years (approximate)
1995
2000s
About 2008
Number of Keys
44
50 with keypad
50 with keypad
Number of Digits
10
10
10
Contrast the Screen?
No
Yes
Yes
Modes
[MODE]:
Engineering
Complex Numbers
SD (1-Var Stats)
LR (Linear Regression)
DEG/RAD/GRAD
FIX/SCI/NORM
[MODE]:
Comp (Compute)
SD (1-Var Stats)
REG (2-Var Stats)
Deg/Rad/Grad
Fix/Sci/Norm
Disp (ab/c, d/c, Dot, Comma)
Contrast
EQN:
2 x 2 linear system, 3 x 3 linear system, quadratic polynomial, cubic polynomial
[MODE]:
Comp (Compute)
Complex (complex numbers)
Stat (Statistics)
Base
Table (f(x), g(x))
Equation: 2 x 2 linear system , 3 x 3 linear system, quadratic polynomial, cubic polynomial
Vector
Verify (comparison tests)
[SETUP]:
MathIO/LinearIO
Deg/Rad/Grad
Fix/Sci/Norm
ab/c vs. d/c
STAT (frequencies on)
TABLE (f or f an g)
Recurring Decimal
Display (comma/decimal point)
Contrast
Statistics Regressions
Linear
Linear, Logarithmic, Exponential, Power, Inverse, Quadratic
Linear, Quadratic, Logarithmic, Exponential, Power (both a*b^x and a*x^b), Inverse
Display
One line: classic post-fix notation
2-line display, top: entry, bottom: result
Textbook (can be set to 2-line display)
Exact Answers
Fractions (when they are used)
Fractions
Fractions, Square Root, Pi
Statistical Registers
On the keyboard
In two menus: S-SUM, S-VAR
In a menu: STAT
Statistical Data Entry
With the [M+] button
With the [M+] button
In a table
Multi-statement operations
N/A
Yes (with [ : ] )
Yes (with [ : ] )
Rect to Polar Conversions
View only (exchange answers with X ←→ Y)
E = r, F = θ
X = r, Y = θ
Answer is displayed
Polar to Rect Conversions
View only (exchange answers with X ←→ Y)
E = x, F = y
X = x, Y = y
Answer is displayed
Calculus Functions
None
Integral, Derivative, Solve for X
Integral, Derivative, Solve for X, Sum, Product
Variables
M, Kin/Kout 1-6
A,B,C,D,E,F,X,Y,M
A,B,C,D,E,F,X,Y,M
Extras
Engineering Symbols
Engineering Symbols
GCD, LMC, Int, Intg, RandInt, Factoring Integers (FACTOR)
Power
Solar/Battery Backup: G927
Solar/Battery Backup: LR44
Solar/Battery Backup: LR44
Eddie
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