Casio fx115D
Casio fx115MS
Casio fx115ES Plus

Casio fx115D

Casio fx115MS

Casio fx115ES 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 (1Var Stats)
LR (Linear Regression)
DEG/RAD/GRAD
FIX/SCI/NORM

[MODE]:
Comp (Compute)
SD (1Var Stats)
REG (2Var 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 postfix notation

2line display, top: entry, bottom: result

Textbook (can be set to 2line display)

Exact Answers

Fractions (when they are used)

Fractions

Fractions, Square Root, Pi

Statistical Registers

On the keyboard

In two menus: SSUM, SVAR

In a menu: STAT

Statistical Data Entry

With the [M+] button

With the [M+] button

In a table

Multistatement 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 16

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
All original content copyright, © 20112019. Edward Shore. Unauthorized use and/or unauthorized distribution for commercial purposes without express and written permission from the author is strictly prohibited. This blog entry may be distributed for noncommercial purposes, provided that full credit is given to the author.