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Four great little calculators for under $20! The Author (TA) owns 3 of the 4 (he borrowed the 4th calculator to write this review), therefore he does not have to make the difficult decision of which one to buy. Prices from Amazon October 2013.
Your comments, corrections, questions, omissions are encouraged, even welcomed. Thanks.
CASIO FX-115ES PLUS 16.24 (C)
CANON F-792SGA 15.14 (N)
SHARP EL-W516B (EL-W516X 17.30) (S)
TI-36X PRO 19.97 (T)
COMPLEX NUMBERS
C,N exact radical form
S can only be stored in M, division can not be entered as fraction
T does not require COMPLEX mode, must scroll to see all digits
STATISTICS/REGRESSION
C,N,S quadratic regression calculates both x1' and x2'
N calculates mode and range
S does not calculate min Q1 med Q3 max, easy to RCL vars and to calc x' & y'
T cubic regression, 2-Var Stats menu includes x'(y) and y'(x) for linear reg
DISTRIBUTION
C,T normal, inverse normal, binomial, Poisson
N,S P(x) Q(x) R(x) x>t
BASE NUMBERS
N binary numbers displayed in blocks of 4-digits
S can not + - * / different bases (no b o d h prefix/suffix), PEN (base 5)
T calculates LOGIC nand
POLYNOMIAL EQUATIONS
C,N 2nd degree (quadratic formula) exact radical form
C,T calculates vertex of parabola (S functions can be programmed)
N 4th degree polynomial (includes complex roots)
T gives option of storing results in variable memories
POLYNOMIAL INEQUALITY
C,N exact radical form of 2nd degree polynomial
N 4th degree polynomial
S,T no inequality
SYSTEMS OF EQUATIONS
C Infinite Solution & No Solution enunciators
N solves 4X4 system
S 4X4 matrices can solve 4X4 system using Inv(4X4)X(4X1)
S calculates determinant of Cramer-method denominator
T gives results of 2-equation 3-variable system in terms of z
FUNCTION TABLE
C 2 functions, f(x) & g(x) calculated side-by-side
N 1 function, f(x)
S no function table
T 1 function, Auto scrolls up or down from initial value of x
T x=? inputs user values for x (Auto is disabled)
MATRIX
C,T ref & reduced-ref
N, S 4X4 matrices, 4th matrix (matrix D)
N calculates adjoint matrix
S fill, cumulative, augment, random, matrix>list
N,S,T identity matrix
VECTOR
N 4th vector (vector D)
S no vector mode (uses LIST to calculate dot & cross products)
LIST
C,N no list mode
S 4th list (list 4), square, cube, reciprocal can be applied to lists
S sort A&D, fill, cum, difference list, aug, abs (sqrt of sqr-sum)
S min max mean median sum product SD variance, list>matrix
T list formulas accept all calculator functions and real numbers
UNIQUE FEATURES
C VERIFY checks results of number & algebra expressions
C PreAns (PreAns + Ans generates Fibonacci Sequence)
C recurring decimal (gives ALL 60 digits of 1/61)
C remainder division (N,T have mod function)
C old FX-115MS SOLVE did not require comma-variable to select
C old FX-115MS % could calculate percent + or - & percent change
C,N multi-statements (displays all 6 answers of ambiguous case with =)
C old FX-115MS could COPY multi-statements
C,N independent memory M (generates & totals A or G sequence with =)
C,N Square Root & Ans require single keystroke (not Shift 2nd 2nd-F ALPHA)
N RATIO solves 3rd or 4th term of direct proportion
N 38 math & science & engineering formulas
S DRILL quizzes & grades user on basic add, sub, mult, div
S % + or - (with single keystroke of %), (C,N,T % only changes % to decimal)
S Simpson's rule, N=1, exact & fast for 2nd & 3rd degree polynomials
S no Int, Mod, Prime Factors, PI (product of sequence), GCF, LCM
S GCF & LCM can easily be calculated with fraction button
S SOLVER only solves for X
S 4 formula memories, 4 definable memories, 4 constant (K) calculations
S CTLG gives complete catalog of all available functions for each mode
S OFF displays SHARP logo with name and telephone number of owner
S no parentheses for argument (X) = fewer keystrokes (log trig trig-h R<>P)
S 9 Metric/Engineering Suffixes (femto - Tera)
T Multi-Tap Keys cycle through multiple functions when pressed (! nCr nPr)
T recall (RECALL VAR) displays menu of all 8 memory variables & stored values
T memory X can be accessed with a single keystroke
T set-op & op Stored Operations (up to 44 characters) applied to ANS or entry
T can not clear old data with single keystroke (matrix, vector, poly, sys)
T no cube, cube-root, independent-memory (M)
FRACTION DECIMAL CONVERSIONS
C S<>D (improper>repeating>decimal), shift a b/c<>d/c (mixed)
N F<>D (improper<>decimal), shift a b/c<>d/c (mixed)
S CHANGE (mixed number>improper>decimal), no shift, no menu
T f<>d (decimal<>improper), math menu 1:n/d<>Un/d (mixed)
T each conversion regarded as new calculation & bumps display upward
EXPRESSION EVALUATION: C,N CALC; S MATH, ALGB; T expr-eval
S does not accept complex numbers
INTERNAL DIGITS: C 15, N 20, S 14, T 13
CONSTANTS: C 40 (on cover), N 79, S 52, T 20
CONVERSIONS: C 40 (on cover), N 172, S 44, T 40
KEYSTROKES REQUIRED FOR SELECTED PROBLEMS
dms + dms = dms: C,N,S 8; T 35
polar rectangular conversion: C,N 15; S 3; T 18
linear regression & x'(y): C,N 15; S 9; T 23
braking test problem & y'(x): C,N 19; S 13; T 26
base numbers: C,N neg(FF) 8; S -FF 4; T 2's(FF) 16
complex division: C,N 13; S 16; T 24 (requires scrolling)
cross product: C,N 24; S 35; T 36
| Manufacturer | Casio |
|---|---|
| Brand | Casio |
| Item Weight | 3.35 ounces |
| Product Dimensions | 0.44 x 6.38 x 3.15 inches |
| Item model number | FX-115ESPLUS |
| Batteries | 1 LR44 batteries required. |
| Is Discontinued By Manufacturer | No |
| Color | Black |
| Material Type | Plastic |
| Number of Items | 1 |
| Size | 1-Pack |
| Lines Per Page | 2 |
| Ink Color | black |
| Manufacturer Part Number | fx-115ESPlus |
| National Stock Number | 7420-01-412-4136 |
