Casio fx-260 Setup guide

®
FX 260
Solar Scientific
Calculator
Training Guide
Basic scientific calculator
Solar powered
Ability to fix decimal places
Backspace key to fix
entry mistakes
Single variable statistics
The ONLY
calculator that is
GED approved

CASIO FX 260 SOLAR SCIENTIFIC CALCULATOR 1
CONTENT
MODES
Basic Arithmetic Calculations
Basic Fuctions and Operations
Basic Calculations
Fraction Calculations and Simplification
Percent Calculations
Powers and Roots
Internal Rounding
PROBABILITY
Random Number Generation
Permutations and Combinations
Factorials
MEMORY
Memory Calculations
TRIGONOMETRY
Trigonometric/Inverse Trigonometric Functions
Hyperbolic/Inverse Hyperbolic Functions
Coordinate Conversion
Sexagesimal Functions (Degrees/Minutes/Seconds)
Logarithmic Functions
STATISTICS
Entering and Analyzing Statistical Data

CASIO FX 260 SOLAR SCIENTIFIC CALCULATOR 2
MODE
Before starting a calculation, you must first enter the correct mode.
To perform this type
of calculation:
Perform this key
operation: Name of mode:
Basic arithmetic
calculations
MODE
0COMP
Standard deviation
calculations
MODE
.SD
Calculations using
degrees
MODE
4DEG
Calculations using
radians
MODE
5RAD
Calculations using
gradients
MODE
6GRA
Specify number of
places.
MODE
7
(x= # of decimal places
and ranges from 0–9)
FIX
Specify number of
significant digits to
display.
MODE
8
(x= # of significant
places and ranges from
0–9)
SCI
Cancels FIX and SCI
settings
MODE
9NORM
nDisplay indicators show the current mode setting. If there is no display shown,
this indicates COMP mode.
nThe COMP and SD modes can be used in combination with the angle
unit settings.

CASIO FX 260 SOLAR SCIENTIFIC CALCULATOR 3
BASIC ARITHMETIC CALCULATIONS
Basic Functions and Operations
The following are basic functions and operations of the calculator.
$ Backspaces and deletes the right digit of a displayed input value.
ON
Turns power on.
C
Clears the displayed input value.
L Shifts the keyboard and accesses functions marked above the keys in yellow.
NOTE: There is no power o key.
Basic Calculations
Be sure to press Cwhen beginning a new calculation.
+-mM Addition, subtraction, multiplication, and division
p Performs calculation
+/–
Changes the sign of a displayed value; you must enter the value first.
() Left and right parentheses.
Note: The calculator uses
“order of operations”. For example for 2 + 3 × 4, you do not need
parentheses around 3 × 4. The calculator will calculate 3 × 4, then
add 2.
L
π
c
This will input the numerical value for π.
L
X–Y
[(---
Swaps the value of xand yin power and root calculations.
Also, swaps the minuend and subtrahend in subtraction calculations.
Example: for 32, to swap 3 and 2, press 32L
X–Y
[(---
p.
The answer displayed is 8.

CASIO FX 260 SOLAR SCIENTIFIC CALCULATOR 4
Constant Calculations
You can perform calculations with constant values by setting an automatic
constant to continually add, subract, multiply, or divide. Pressing +,-,m, or M
twice after inputting a number, will make that number a constant. “K” will be shown
on the display, indicating that a constant is being used.
For example, enter [constant] ++. When you press p, the constant will be
added to the number on the display. Pressing C clears the constant.
Display
For example: Each time you press p, it will add 2 to the displayed number
3++4p 7
5p 8
10p 13
Fraction Calculations and Simplification
nUse the COMP mode for fraction calculations.
nYou can perform addition, subratction, multiplication, and division.
nThe result of a calculation that fractions and decimal values are displayed as
a decimal value.
nYou can enter a fraction using the zkey.
nThe total number of digits, including division marks, cannot exceed 10.
Be sure to press C when beginning a new calculation.
z Inputs the integer part of a fraction (mixed number) and the
numerator (b)/denominator (c) of a fraction in the form b/c.
Example: to input ½, press 1z2.
Example: to input 2½, press 2z1z2.
L[d/c] Converts the displayed value between a mixed number and improper
fraction.
z Converts the displayed value between fraction and decimal form.
NOTE: After entering a fraction using z, pressingpwill display it in
simplest form.

CASIO FX 260 SOLAR SCIENTIFIC CALCULATOR 5
Percent Calculations
nUse the COMP mode for percentage calculations.
Example Display
To find percentage of a
number. What is 12% of 15? 15m12L
%
p
1.8
To calculate percentage of one
number to another. What per-
centage of 80 is 40? 40M80L
%
p
50
To add a percentage: 15% of
1000 (or 1000 increased by 15%) 1000m15L
%
p
+1150
To discount a percentage:
85 by 10%. 85m10L
%
p
76.5
Percent change: when a value is
increased from 30% to 36% 36-30L
%
p
20
Percent of increase: when
an amount is added. 300cc is
added to 500cc 300+500L
%
p
160
Powers and Roots
dSquares a number. Example: 5d
q„ Cubes a number. Example: 3q„
Raises a number to a power (other than 2 or 3)
Example:
2
x
y
4p
q
1/x
---)]
Calculates the reciprocal of the displayed value.
Example: 3q
1/x
---)]
qd Calculates the square root of a number.
Example: 9q
d
q
+/
–
Calculates the cube root of a number.
Example: 27q
+/
–
q
x
1/y
Calculates the specified root of a number.
Example: 27⅓, press 27q
x
1/y
3p

CASIO FX 260 SOLAR SCIENTIFIC CALCULATOR 6
Internal Rounding
Calculates internal rounding based on the number of decimal places on the display.
For example, set the calculator to 3 fixed decimal places.
Press
200M7p
Press q
RND
0
This will truncate the number at 3 decimal places.
Press m14p
(The answer displayed is 399.994)
PROBABILITY
Random Number Generation
q
RAN#
.
Generates a random number between 0 and 0.999
Permutations and Combinations
q
n P r
1
A permutation is a selection of objects in which the order matters.
Example: To determine the number of possible different
arrangements using 4 items selected from 10 items.
10q
nPr
1
4p 5040
q
nCr
2
A combination is a selection of objects from a collection and
order is irrelevant.
Example: To determine the number of different combinations of
4 items selected from 10 items. 10q
nCr
2
4p 210
Factorials
q
x!
.
Calculates the factorial of a number. Example: 5q
x!
.

CASIO FX 260 SOLAR SCIENTIFIC CALCULATOR 7
MEMORY
Memory calculations
The memory is convenient for calculating cumulative totals.
m Adds displayed value to memory.
R
Recalls the value stored in memory.
q
m
M–
Subtracts the displayed value from memory.
q
R
Min
Replaces the current memory contents with the displayed value.
To clear memory, press 0q
R
Min
or Cq
R
Min

CASIO FX 260 SOLAR SCIENTIFIC CALCULATOR 8
TRIGONOMETRY
Be sure to select the angle unit (D,R,G) you want to use before beginning
a calculation.
Mode 4 = Degrees (Deg)
Mode 5 = Radians (Rad)
Mode 6 = Grad s (Gra)
Trigonometric/Inverse Trigonometric Functions
To calculate the sine, cosine, or tangent of the displayed angle.
Example: (in degree mode): 30j (= .5)
To calculate the arcsine, arccosine, or arctangent
Example: (in degree mode):.5qj (= 30)
Hyperbolic/Inverse Hyperbolic Functions
To calculate the hyperbolic sine, cosine, or tangent of the displayed angle.
Example: (in degree mode): 3.6cq (= 18.28545536)
To calculate the hyperbolic arcsine, arccosine, or arctangent of the displayed angle.
Example: (in degree mode): 30cq
Sin-1
h
OR
30qc
Sin-1
h
(= 4.094622224)
Coordinate Conversion
You can convert between rectangular and polar coordinates.
Make sure you are using the correct angle unit (D,R,G) before staring your calculation.
q
R–P
+
Rectangular to polar coordinate conversion
q
P–R
-
Polar to rectangular coordinate conversion
qUse this operation to switch between the two coordinates produced by
the conversion operation.
Example: To convert polar coordinates (r = 2, θ= 60) to rectangular
coordinates (x, y).
2q
P–R
-
60p This gives you the xvalue.
qThis gives you the yvalue.
Degrees/Minutes/Seconds
You can perform calculations using degrees, minutes, and seconds, and convert between
sexagesimal and decimal values.
Example:
Keystrokes Display
2.5p 2.5
Press x 2° 30° 0
10x15x12xO4p 41° 0° 48°

CASIO FX 260 SOLAR SCIENTIFIC CALCULATOR 9
Logarithmic Functions
You can find logarithms, natural logarithms, and antilogarithms.
g Calculates the common logarithm of the displayed value.
100g
h Calculates the natural logarithm (base e) of the displayed value.
90h
q
10
x
g
Calculates the common antilogarithm of the displayed value,
which is 10 raised to the power of the value.
2q
10
x
g
q
e
x
G
Calculates the natural antilogarithm of the displayed value,
which is eraised to the power of the value.
1q
ex
G

CASIO FX 260 SOLAR SCIENTIFIC CALCULATOR 10
STATISTICS
Entering and Analyzing Statistical Data
Enter the statistics mode (SD) by pressing w..
Cancle FIX and SCI settings by pressing w9.
Pressing w0 (COMP) exits the SD mode and clears all data.
q
C
SAC
Clears statistical memory; be sure to perform this operation before
inputting new data.
m
DATA
Inputs the displayed value as data. Press
m
DATA
twice to input two
entries if the same value.
(NOTE): This is the mkey.)
qDeletes the displayed value as data.
NOTE: You can input multiple entries of the same data using O.
To input 100 ten times, press 100O10
m
DATA
q
n
6
After entering data, you can retrieve the following values:
q
σn-1
9
Sample standard deviation.
q
σn
8
Population standard deviation.
q
x
7
Arithmetic mean.
q
n
6
Number of data items.
q
∑x
5
Sum of data.
q
∑x
2
4
Sum of the squares.

CASIO FX 260 SOLAR SCIENTIFIC CALCULATOR 11

CASIO FX 260 SOLAR SCIENTIFIC CALCULATOR 12
NOTES