1 - 4 Key markings

Many of the calculators keys are used to perform more than one function. The functions marked on the keyboard are printed differently to help you find the one you need quickly and easily. Keyboard marking White Yellow Green Meaning Direct input Press [ 2nd ] and then key Press key in Base-n mode E-3
Before starting calculation

Changing a mode

Pressing [ MODE ] can enter mode menus. You can choose one of six operating modes, including 0)MAIN , 1)STAT , 2)Base-n , 3)CPLX , 4)VLE , 5)QE. Give 2)Base-n as an example : Method 1 : Scroll through the menus using [ ] or [ ] until 2)Base-n is shown, then enter the desired mode by pressing [ ENTER ]. Key in directly the number of the mode, [ 2 ] , to enter the mode immediately.

Method 2 :

Selecting an item from display menus
Many functions and settings are available on menus. A menu is a list of options displayed across the entry line. Give Pressing [ DRG ] key displays the menu for choosing the angle setting under MAIN mode as an example : Method : Press [ DRG ] to display the menu, and then move the cursor [ ] or [ ] to an item you want. Press [ ENTER ] while the item is underlined.
For menu items followed by an argument value, enter the argument value while the item is underlined. The item and the argument value are displayed in the previous screen.

Using 2nd keys

To execute the functions marked in yellow, please press [ 2nd ] and then the corresponding key. When you press [ 2nd ], the 2nd indicator shown in the display is to tell you that you will be selecting the second function of the next key you press. If you press [ 2nd ] by mistake, simply press [ 2nd ] again to remove the 2nd indicator.

Cursor

Pressing [ ] or [ ] key can move the cursor to the left or the right. Hold down any of those keys to move the cursor at high speed. Pressing [ ] or [ ] can scroll the display up or down while there are previous entries hidden the display. You can reuse or edit a previous entry when it is on the entry line.
Making corrections during input
To delete a character at the cursor, make the character underlined by using [ ] or [ ] to move the cursor, and then press [ DEL ] to delete the character. Besides, holding down [ DEL ] can deletes all characters to the right ; then, E-4

deletes 1 character to the left of the cursor each time you press [ DEL ]. To replace a character, make the character underlined by using [ ] or [ ] to move the cursor, and then enter a new entry to replace the character. To insert a character, move the cursor to the position of the character where you want to insert, it will be inserted in the front of the character after pressing [ 2nd ] [ INS ] and entering a new character. (Note) : The blinking cursor means the calculator is in insert mode On the contrary, the blinking cursor is displayed as _ and it means the calculator is in overwrite mode. To clear all characters, clear all input character by [ CL ] key.

Replay function

This function stores the latest operation executed. After execution is complete, pressing [ ] or [ ] key will display the operation from the beginning or the end. You can continue moving the cursor by [ ] or [ ] to edit it. To delete a digit, press [ DEL ]. ( or, in overwrite mode, just type over the digit). See Example 1. The replay function can keep input digits up to 228 characters for SRP-280 or 320 characters for SRP-285. After execution is complete or during entering, you can press either [ ] [ ] to display previous input steps and edit values or commands for subsequent execution. See Example 2. (Note) :The replay function isnt cleared even when [ CL ] is pressed or power is turned off, so contents can be recalled even after [ CL ] is pressed. However, replay function is cleared when mode or operation is switched.
Error position display function
When a mathematically illegal calculation is performed, error position display function will tell you with the cursor where the error is. Press [ ] or [ ] to move the cursor and then give it a correct entry. You can also clear an error by pressing [ CL ] and then re-entered the values and expression from the beginning. See Example 3.

Memory calculation

Press [ M+ ] to add a result to running memory. Press [ M ] to subtract the value from running memory. To recall the value in running memory, press [ MRC ]. To clear running memory, press [ MRC ] twice. See Example 4. The calculator has eight memory variables for repeated use : A, B, C, X, Y, X1, X2, PROG. You can store a real number in variables A, B, C, X, Y, X1, X2 and an expression in PROG. See Example 5. * [ P/V RCL ] recalls all variables. E-5

* * * *

[ SAVE ] lets you store values to variables. [ 2nd ] [ RECALL ] recalls the value of variable. [ 2nd ] [ CL-VAR ] clears all variables except PROG. [ 2nd ] [ CL-PROG ] clears the contents of PROG.

X < 0 Y = n, 1/(2n+1), n is an integer. but -1 x < Y log | X | 100
y 0 : x 0, 1 x < 1 x y=0 x 0

log Y 100

y < 0 x = 2n+1, I/n, n is an integer.(n 0) but 1 x < x log | y | 100 nPr, nCr STAT 0 r n, n < 10 100, n,r are integers. | x | 1x| y | 1xSRP-280 : 1 -VAR : n 40, 2 -VAR : n 40 SRP-285 : 1 -VAR : n 42, 2 -VAR : n 42 FREQ. = n, 0 n < _ _ x y, x, y, a, b, r : n 0 Sx, Sy :n 0,1 DEC : -2147483648 X 2147483647 BIN : 10000000000000000000000000000000 X 11111111111111111111111111111111 (for negative) 0 X 01111111111111111111111111111111 (for zero, positive) OCT : 20000000000 X 3777777777 (for negative) 0 X 17777777777 (for zero or positive) HEX : 80000000 X FFFFFFFF(for negative) 0 X 7FFFFFFF (for zero or positive)

Base-n

Error conditions
Error massage will appear on the display and further calculation becomes impossible when any of the following conditions occur. SRP-280 DOMAIN Er DOMAIN Er DIVIDE BY O When specifying an argument to a function outside the valid range. FREQ value ( in 1-VAR stats) < 0 or non-integer. You attempted to divide by 0. SRP-285 DOM Error FREQ DOMAIN Error DIVIDE BY O Error OVERFLOW Error
OVERFLOW Er When result of function calculations exceeds the range specified. E-8

STAT Er SYNTAX Er

When not in STAT mode, pressing [ DATA ] or [ STATVAR ]. (1) Input errors are made. (2) When improper arguments are used in commands or functions that require arguments. There is no solution or infinite to the simultaneous equation under VLE mode. There is no real solution to quadratic equation under QE mode. SYN Error
NO SOL MULTI SOLS NO REAL SOL LENGTH Er
NO SOL MULTI SOLS NO REAL SOL
An entry for SRP-280 exceeds 84 digits IMP LENGTH (The limit for SRP-285 is 88 digits) after Error implied multiplication with auto-correction.
To release the above errors, please press [ CL ] key.

Mode 0 - MAIN

Arithmetic calculation
Arithmetic operations are performed by pressing the keys in the same sequence as in the expression. See Example 6. For negative values, press [ () ] before entering the value. See Example 7. For mixed arithmetic operations, multiplication and division are given priority over addition and subtraction. See Example 8. Results greater than 1010 or less than are displayed in exponential form. See Example 9.

Display formats

Decimal places formats are selected by pressing [ 2nd ] [ TAB ] to display the menu. To set decimal places to n ( F0123456789 ), enter a n value directly or press [ ENTER ] key while the item is underlined. (The default setting is floating point notation F and the n value is ). See Example 10. Even if the number of decimal places is specified, internal calculation for a mantissa is performed in 14 digits for SRP-285 and 24 digits for SRP280, and the display value is stored in 10 digits. To round off those values to the specified number of decimal places, press [ 2nd ] [ RND ]. See Example 11. E-9

Number display formats are selected by pressing [ 2nd ] [ SCI/ENG ] to display the menu. The items on the menu are FLO (for floating point), SCI ( for scientific), and ENG (for engineering). Press [ ] or [ ] until the desired formats is underlined, and then press [ ENTER ]. See Example 12. (Note) : The engineering format is similar to the scientific format, except the mantissa can have up to three digits left of the decimal, instead of only one, and the exponent is always a multiple of three. It is useful for engineers to convert units based on multiples of 10 3. You can enter a number in mantissa and exponent form by [ EXP ] key. See Example 13.

Parentheses calculations

Operation inside parentheses are always executed first. SRP-280 can use up to 14 levels of consecutive parentheses in a single calculation. SRP-285 can use up to 22 consecutive levels of parentheses in a single calculation. See Example 14. Closed parentheses occurring immediately before operation of the [ ENTER ] key may be omitted, no matter how many are required. See Example 15. A multiplication sign x occurring immediately before an open parenthesis can omitted. See Example 16. (Note) : The calculator can auto-correct abbreviated multiplication in front of all functions, except memory variables, left parenthesis, type B functions. Henceforth, abbreviated type will not be used in this manual. See Example 17. The correct result cannot be derived by entering [ ( ] 2 [ + ] 3 [ ) ] [ EXP ] 2. Be sure to enter [ x ] 1 between the [ ) ] and [ EXP ] in the below example. See Example 18.

Percentage calculation

[ 2nd ] [ % ] divides the number in the display by 100. You can use this key sequence to calculate percentages, add-ons, discounts, and percentages ratios. See Example 19.
Continuous calculation function
The calculator enables you to repeat the last operation executed by pressing [ = ] key for further calculation. See Example 20. Even if calculations are concluded with the [ = ] key, the result obtained can E - 10
be used for further calculation. See Example 21.

Answer function

Answer function stores the most recently calculated result. It is retained even after the power is turned off. Once a numeric value or numeric expression is entered and [ ENTER ] is pressed, the result is stored by this function. See Example 22. (Note) : Even if execution of a calculation results in an error, however, Answer memory retains its current value.

Logarithms and Antilogarithms
The calculator can calculate common and natural logarithms and antilogarithms using [ LOG], [ LN ], [ 2nd ] [ 10 x ], and [ 2nd ] [ e x ]. See Example 23.

Fraction calculation

Display of Display of 12
Fraction value display is as follow :
To enter a mixed number, enter the integer part, press [ A b/c ], enter the numerator, press [ A b/c ], and enter the denominator ; To enter an improper fraction, enter the numerator, press [ A b/c ], and enter the denominator. See Example 24. 12 During a fraction calculation, if the figure is reducible, a figure is reduced to the lowest terms after pressing a function command key ( [ + ], [ ], [ x ] or [ ] ) or the [ = ] key. By pressing [ 2nd ] [ A b/c d/e ], the displayed value will be converted to the improper fraction and vice versa. See Example 25. To convert between a decimal and fractional result, press [ 2nd ] [ F D ] and [ ENTER ]. See Example 26. Calculations containing both fractions and decimals are calculated in decimal format. See Example 27.

Angle units conversion

The angle units (DEG, RAD, GRAD) is set by pressing [ DRG ] to display the angle menu. The relation among the three angle units is : 180 = rad = 200 grad Angle conversations ( See Example 28.) : E - 11
1. Change the default angle settings to the units you want to convert to. 2. Enter the value of the unit to convert. 3. Press [ DMS ] to display the menu. The units you can select are (degrees), (minutes), (seconds), r (radians) , g (gradians) or DMS (Degree-Minutes-Seconds). 4. Choose the units you are converting from. 5. Press [ ENTER ] twice. To convert an angle to DMS notation, select DMS , which converts an entry to DMS notations, i.e., where 1O 30 I 0 II represents 1 degrees, 30 minutes, 0 seconds. See Example 29. To convert a DMS notation to decimal, select (degrees), (minutes), (seconds). See Example 30.

2 - 10

Trigonometric / Inverse-Tri. functions
SRP-280 / SRP-285 provides standard trigonometric functions and inverse trigonometric functions - sin, cos, tan, sin 1, cos 1 and tan 1. See Example 31. (Note) : When using those keys, make sure the calculator is set for the angle unit you want.

2 - 11

Hyperbolic / Inverse-Hyp. functions
SRP-280 / SRP-285 uses [ 2nd ] [ HYP ] to calculate the hyperbolic functions and inverse- hyperbolic functions - sinh, cosh, tanh, sinh 1, cosh 1 and tanh 1. See Example 32. (Note) : When using those keys, make sure the calculator is set for the angle unit you want.

2 - 12

Coordinates transformation
Pressing [ 2nd ] [ R P ] displays a menu to convert rectangular coordinates to polar coordinates or vice versa. See Example 33. Rectangular Coordinates Y y 0 x P( x, y ) X x + y i= r (cos + i sin Polar Coordinates Y ) r 0

P( r,

(Note) : When using those key, make sure the calculator is set for the angle unit you want. E - 12

2 - 13

Probability
Pressing [ PRB ] displays the probability menu. See Example 34. With the following functions : nPr Calculates the number of possible permutations of n item taken r at a time. nCr Calculates the number of possible combinations of n items taken r at a time. ! Calculates the factorial of a specified positive integer n , where n 69. < SRP-280 > RANDM Generates a random number between 0 and 1. < SRP-285 > RAND Generates a random number between 0 and 1.

2 - 14

Other functions ( X1,

X 2, ^ )

The calculator also provides reciprocal ( [ X 1] ), square root ([ ] ), universal root [ X ], square ( [ X 2 ] ) and exponentiation ( [ ^ ] ) functions. See Example 35.

2 - 15

Unit Conversion
The calculators has a built-in unit conversion feature that enables you to convert numbers from metric to English units and vice versa. See Example 36. 1. 2. Enter the number you want to convert. Press [ 2nd ] [ CONV ] to display the menu. There are 7 menus, covering distance, area, temperature, capacity, weight, energy, and pressure. Use the [ ] [ ] to scroll through the list of units until a appropriate units menu is shown, then [ ENTER ]. Pressing [ ] or [ ] can convert the number to another unit.

2 - 16

Physics constants
You can use a number physics constants in your calculations. With the following constants : Symbol c g G Vm NA e Meaning Speed of light Acceleration of gravity Gravitational constant molar volume of ideal gas Avagadros number Elementary charge E - 13 Value 299792458 m / s 9.80665 m.s 2 6.6725985 x N.m 2 kg 2 0.0224141 m 3 mol 1 6.022136736 x mol 1 1.6021773349 x C
Electron mass Proton mass Planks constant Boltzmanns constant
9.109389754 x kg 1.672623110 x kg 6.626075540 x J.s 1.38065812 x 10 23J.K 1
To insert a constant at the cursor position ( See Example 37.) : 1. 2. 3. Press [ CONST ] to display the physics constants menu. Press [ ] until the constant you want is underlined. Press [ ENTER ].

3 Mode 1 - STAT

There are three menu operation in statistics menu : 1 -VAR ( for analyzing data in a single dataset), 2 - VAR ( for analyzing paired data from two datasets ) and CLR- DATA ( for clearing all datasets). See Example 38.
To enter data for statistical analysis :

1. 2. 3. 4. From the statistics menu, choose 1 -VAR or 2 - VAR. Press [ DATA ]. Enter an X - values and press [ ]. Enter the frequency ( FREQ for SRP-280 / F for SRP-285) of the X - value (in 1 -VAR mode) or the corresponding Y - value ( in 2 - VAR mode ) and press [ ]. To enter more data, repeat from step 3.
To analyze data you have entered :
1. Press [ STATVAR ]. A range of statistical variables (see table below ) is displayed on the statistical result menus. The first variable ( n ) is underlined and its value is on the result line. Press [ ] to scroll through the statistical results menu. The value of each variable is displayed on the result line. To use a value in a calculation, press [ ENTER ] when the values is displayed. The values is copied to the entry line. To predict a value for x ( or y ) given a value for y ( or x ), select the x ( or y ) variable, press [ ENTER ], enter the given value, and press [ ENTER ] again. Variable Meaning n _ Number of x values or x-y pairs entered. _ x or y Mean of the x values or y values Sx or Sy Sample standard deviation of x values or y values. x or y Population standard deviation of x values or y values x or y Sum of all X values or y values 2 x or y 2 Sum of all x 2 values or y 2 values E - 14

2. 3. 4.

xy a b r x y
Sum of (x x y) for all x-y pairs Linear regression y-intercept Linear regression slope Correlation coefficient Predicted x values given a, b, and a y values Predicted y value given a, b, and x value.
(Note) : If an error message appears in the display under STATVAR menu, just pressing [ ] or [ ] can continue viewing next statistical variable value.

To view or change data :

1. 2. 3. Press [ DATA ]. Press [ ] to scroll through the data you have entered. To change an entry, display it and enter the new data. The new data you enter overwrites the old entry. Press [ ] or [ ENTER ] to save the change.
(Note) : Even you exit STAT mode, all data in 1 - VAR and 2 - VAR mode are still retained unless you clear all data by selecting CLR - DATA mode.

Mode 2 - Base-n

Bases conversions
The number system (10, 16, 2 , 8 ) is set by pressing [ 2nd ] [ dhbo ] to display the menu, making one of the items underlined followed [ ENTER ]. A corresponding symbol - d , h, b, o appears on the display. (The default setting is d : decimal base). See Example 39. (Note) : The total range of numbers handled in this mode is 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F. If values not valid for the particular number system are used, attach the corresponding designator (d, h, b, o), or an error message will appear. Binary base ( b ) : 0, 1 Octal base ( o ) : 0, 1, 2, 3, 4, 5, 6, 7 Decimal base ( d ) : 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 Hexadecimal base ( h ) : 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F Pressing [ ] can use block function to display a result in octal or binary base which exceeds 8 digits. The system is designed to display up to 4 blocks. See Example 40.

E - 15

Negative expressions
In binary, octal, and hexadecimal bases, the calculator represents negative numbers using complement notation. The complement is the result of subtracting that number from 10000000000 in that numbers base by pressing [ NEG ] key in non-decimal bases. See Example 41.
Basic arithmetic operations for bases
The unit enables you to calculate in number base other than decimal. The calculator can add, subtract, multiply, and divide binary, octal, and hexadecimal numbers. See Example 42.

Logical operation

Logical operations are performed through logical products (AND), negative logical (NAND), logical sums (OR), exclusive logical sums (XOR), negation (NOT), and negation of exclusive logical sums (XNOR). See Example 43.

5 Mode 3 - CPLX

Complex mode enables you to add, subtract, multiply, and divide complex numbers. See Example 44. The results of a complex operation are displayed as follow : Re Real value ab Absolute value Im ar Imaginary value Argument value

Mode 4 - VLE

Variable linear equations (VLE) mode can solve a set of simultaneous equations with two unknowns as follows : ax+by=c d x + e y = f, where x and y are unknown. In VLE mode, you just enter each coefficient ( a, b, c, d, e, f ) in the correct order, and the calculator automatically solves for x, y. See Example 45.

Mode 5 - QE

Quadratic equations (QE) mode can solve a equations as follows : a x 2 + b x + c = 0, where x is unknown. In QE mode, you just enter each coefficient ( a, b, c ) in the correct order, and the calculator automatically solves for all x values. See Example 46. E - 16

Example Example 1

Change 123 x 456 as 12 x [ x ] 456 [ = ]

MAIN DEG

56088. [ ][ ][ ] [ DEL ]

[ ][ ][ ]7

12 457_ [ ENTER ]

Example 2

After executing 1+ 2, 3 + 4, 5 + 6, use replay function to recall 1[+]2[=]3[+]4[=] 5[+]6[=] [ ]

5+6 11.

5+6 [ ]

3+4 [ ]

Example 3
x 2.3 mistakenly input instead of x 2.3 After 5 Sec 14 [ ] 0 [ x ] 2.3 [ ENTER ] ( SRP-280 )

DIVIDE BY 0.

14 / 0 2.3 [ ] [ 2nd ] [ INS ] 1 [ ENTER ]

14 / 10 2.3 3.22

Example 4
[( 3 x 5 ) + ( ) ( 74 - 8 x 7 )] = [ x ] 5 [ M+ ]

M MAIN DEG

[ ] 7 [ M+ ]

M MAIN

56 / 7 8.

[ MRC ] [ ENTER ]

23 23.

MAIN M DEG

74 [ ] 8 [ x ] 7 [ 2nd ] [ M ]

7 [ MRC ] [ ENTER ]

[ MRC ] [ MRC ] [ CL ]

Example 5

Put the value 30 into variable A Multiple 5 to variable A, then put the result into variable B Add 3 to variable B To clear the contents of all variables Set PROG = 3 X + 5 Y Set X = 55, Y = 6, get 3 X + 5 Y = 195 [ 2nd ] [ CL-VAR ] 30 [ SAVE ] ( SRP-280 ) [ ENTER ]

A B C X

[ x ] [ 2nd ] [ RECALL ]
A B C X Y 30. [ ENTER ] [ ENTER ]

[ SAVE ] [ ] [ ENTER ]

Ans [ P/V RCL ] [ ] [ ENTER ] [ + ] 3

B 150.

[ ENTER ]
B+3 153. [ 2nd ] [ CL-VAR ] [ P/V RCL ] ( SRP-280 ) 3 [ P/V RCL ] [ ] [ ( SRP-280 ) ][ ]

A B C X Y

A B C X Y ]
[ ENTER ] [ + ] 5 [ P/V RCL ] [ ] [ [ ][ ] ( SRP-280 ) [ ENTER ]

3X+5Y [ SAVE ] [ ]

X1 X2 PR0G [ ENTER ]
3X+5Y [ P/V RCL ] [ [ ENTER ] [ ] 55 ]

PR0G 0.

X = 55 [ ]6

Y=6 [ ENTER ]

3X+5Y 195.

Example 6

1+2x3=7 1[+]2[x]3[=]

Example 7

3.5 + = 0.5 [ () ] 3.5 [ + ] 8 [ ] 2 [ = ]

3.5 + 8 / 2 0.5

Example 8
7 +10 x = [ + ] 10 [ x ] 8 [ ] 2 [ = ]

7 + / 2 47.

Example 9
12369 x 7532 x 74103 = [ x ] 7532 [ x ] 74103 [=]

6.903680613 x 10 12

Example 10

= 0.857142857. 6[]7[=]

6/7 0.857142857 [ 2nd ] [ TAB ] [ ][ ][ ] [ ENTER ]

F0123456789

MAIN DEG TAB
6/7 0.86 [ 2nd ] [ TAB ] 4
6/7 0.8571 [ 2nd ] [ TAB ] [ ]

6/7 0.857142857

Example 11
16x6=1 RND ( ) x 6 = 1.002 [ 2nd ] [ TAB ] [ ][ ][ ][ ] [ ENTER ] 1 [ ] 6 [ = ]

1/6 0.167 [x]6[=]

Ans 6 [ 2nd ] [ RND ] 1[]6[=] [x]6[=]

DEG TAB

RND ( 1 / 6 ) 0.167

Example 12

= 0.0001666. 1 [ ] 6000 [ = ]
1 / 6000 0.000166667 [ 2nd ] [ SCI / ENG ] [ ]

FLO SCI ENG [ ENTER ]

MAIN DEG SCI
1 / 6000 1.666666667 x1004 [ 2nd ] [ SCI / ENG ] [ ]

MAIN DEG ENG

1 / 6000 166.6666667 x10 06

Example 13

0.015 = 1.5 x 10

3 MAIN DEG

1.5 [ EXP ] [ () ] 3 [ ENTER ]

1.5 E 3 0.0015

Example 14
( x 1.5 ) x 3 = 6 [ ( ] 5 [ ] 2 [ x ] 1.5 [ ) ] [ x ] 3[=]

( 5 - 2 * 1.5 ) * 3 6.

Example 15
2 + 3 x ( 5 + 4 ) = 29 2[+]3[x][(]5[+]4[=]

2+3(5+4 29.

Example 16
( ) x ( 8 + 5 ) = 65 [(]7[]2[)][(]8[+]5 [=]

(7 2)(8+5 65.

Example 17
2 x { 7 + 6 x ( 5 + 4 ) } = 122 2[x][(]7[+]6[x][(] 5 [ + ] 4 [ =]

2 ( 7+ 6 ( 5+4 122.

Example 18
( 2 + 3 ) x = 500 [ ( ] 2 [ + ] 3 [ ) ] [ x ] 1 [ EXP ] 2[=]

( 2 + 3 ) 1E2 500.

Example 19

120 x 30 % = 55% = 160

120 [ x ] 30 [ 2nd ] [ % ] [ = ]
% 88 [ ] 55 [ 2nd ] [ % ] [ = ]

88 / 55 % 160.

Example 20
3 x 3 x 3 x 3 = 81 3[x]3[=]

[x]3[=]

Ans 3 [=]

Example 21

To calculate 6 after 3 x 4 = 12 3[x]4[=]

34 []6[=]

Ans / 6 2.

Example 22

123 + 456 = 579 = 210

123 [ + ] 456 [ = ]

123 + 456 579. 789 [ ] [ 2nd ] [ ANS ] [ ENTER ]

789 Ans 210.

Example 23
ln7 + log100 =3.945910149 [ LN ] 7 [ ] [ + ] [ LOG ] 100 [ = ] [ 2nd ] [ 10 x ] 2 [ = ] 10

e 5 = 0.006737947

l n ( 7 )+ l o g ( 1 3.945910149
10 ^ ( 2 ) 100. [ 2nd ] [ e x ] [ ( ) ] 5 [ = ]

e^(5) 0.006737947

Example 24

/ 3 + / 7 = 22

8 / 21 MAIN DEG
7 [ A b/c ] 2 [ A b/c ] 3 [ + ] 14 [ A b/c ] 5 [ A b/c ] 7 [ = ]

3 +22 U 8 / 21

Example 25
4 2/4 = 4 1/[ A b/ c ] 2 [ A b/ c ] 4 [ ENTER ] [ 2nd ] [ A [ ENTER ]

b/c d/ e ] MAIN DEG

U1 / 2

d/ e ] MAIN

d/e 9/2
[ 2nd ] [ A b/c [ ENTER ]

a b/c d/e 4 U1 / 2

Example 26
/ 2 = 4.[ A b/ c ] 1 [ A b/ c ] 2 [ 2nd ] [ F D] [ ENTER ]

Example 27

/ 5 + 3.75 = 12.[ A b/c ] 4 [ A b/c ] 5 [ + ] 3.75 [ ENTER ]

5 + 3.75 12.55

Example 28

2 rad. = 360 deg. [ DRG]

DEG RAD GRD

[ ENTER ] 2 [ [ ][ ][ ]

] [ DMS ]

DEG r g

[ ENTER ] [ ENTER ]

Example 29

1.5 = 1O 30 I 0 II ( DMS ) 1.5 [ DMS ] [ ]

DMS [ ENTER ] [ ENTER ]

1.5 DMS 1O 30 I 0 II

Example 30

10.= 2.[ DMS ]

MAIN DEG r g

[ ENTER ] 45 [ DMS ] [ ] [ ENTER ] 10.5 [ DMS ] [ ][ ] [ ENTER ] [ ENTER ]

10.5 2.752916667

Example 31
Sin 30 Deg. = 0.5 Sin30 Rad. = 0.988031624 -1 0.5 = 33.33333333 Grad. sin [ DRG ]
DEG RAD GRD [ ENTER ] [ SIN ] 30 [ ENTER ] [ DRG ] [ ]

sin ( 30 ) 0.5

DEG RAD GRD [ ENTER ] [ ENTER ]

MAIN RAD

sin ( 30 ) 0.988031624 [ DRG ] [ ]
[ ENTER ] [ 2nd ] [ SIN 1 ] 0.5 [ ENTER ]
sin 1 ( 0.5 ) 33.33333333

Example 32

cosh1.5+2 = 4.352409615 [ 2nd ] [ HYP ] [ COS ] 1.5 [ ] [ + ] 2 [ = ] [ 2nd ] [ HYP ] [ 2nd ] [ SIN 1] 7 [ = ] sinh -= 2.644120761
cosh ( 1.5 ) + 2 4.352409615

sinh 1 ( 7 ) 2.644120761

Example 33
If x = 5 , y = 30, what are r , ? Ans : r = 30.41381265 = 80.53767779 If r = 25 , = 56, what are x , y ? Ans : x = 13.97982259 y = 20.72593931 [ 2nd ] [ R P]
R Pr R P [ ENTER ] 5 [ 2nd ] [ ] 30 [ ENTER ]

Pr ( 5, 30 )

R Pr ( 5, 30) 30.41381265 [ 2nd ] [ R P][ ]

( 5, 30 )

R P ( 5, 30) 80.53767779 [ 2nd ] [ R P][ ][ ]
P Rx P Ry [ ENTER ] 25 [ 2nd ] [ ] 56 [ ENTER ]

P Rx ( 25, 56 )

P Rx ( 25, 56 ) 13.97982259 [ 2nd ] [ R P][ ]
P [ ENTER ] 25 [ 2nd ] [ ] 56

P Ry ( 25, 56 )

P Ry ( 25, 56 ) 20.72593931

Example 34

7 ! [( ) !] = [ PRB ] 7 ! [( ) ! x 3 !] = ! = 120 SRP-280
nPr nCr ! [ ENTER ] 4 [ ENTER ]
7 nPr 4 840. 7 [ PRB ] [ ]
7 nCr 4 35. 5 [ PRB ] [ ][ ]
nPr nCr ! [ ENTER ] [ ENTER ]

5! 120. [ PRB ] [ ]

RANDM [ ENTER ] [ ENTER ]

RANDM 0.808959961

Example 35

1 / 1.25

+ 4 + 21 = 9 1.25 [ 2nd ] [ X 1] [=]

27 = 3

= 2401
1.0.[ X 2 ] [ + ] [ ] 4 [ + ] 21 [=] 3 [ 2nd ] [ x ] 27 [ = ]

( 4+21 ) 9.

3X 7[ ^ ]4[=]

(27) 3.

7^4 2401.

- 10 -

Example 36
1yd 2 = 9 ft2 = 0.000000836 km 2 ( For SRP-280 ) 1 [ 2nd ] [ CONV ] [ ] [ ]

ft 2 [ ENTER ]

yd 2 m 2

ft 2 yd 2 m 2 1. [ ]

ft 2 yd 2 m2 9. [ ][ ][ ]

km 2 hectars 0.000000836

Example 37
3 x G = 2.0019 x 3 [ x ] [ CONST ] [ ][ ] [ ENTER ] [ ENTER ]

c g G Vm NA

3 6.6725985 2.00177955 x 10 10

Example 38

Enter data : X 1 = 3, Freq.= 2 ; X 2 = 5 , Freq. = 9, then find x = 4.6363636 and Sx = 0.809039835 _ Enter data : X 1 = 3, Y 1 = 4 ; X 2 = 5 , Y 2 = 7, then find x = 4.6363636 and Sx = 0. 809039835 Set y = 6, get x = 4.333333333 Change Y 1 = 4 as Y1 = 9 and X2 = 5 as X2 = 8, then find Sx = 3.535533906 [ MODE ] 1

STAT DEG

1 - VAR 2 - VAR [ ENTER ] [ DATA ] 3
X1=3 [ ]2 ( SRP-280 ) [ ]5[ ] 9 [ STATVAR ]

FREQ 1 = 2

n x Sx [ ]

n x Sx X 4.636363636

- 11 -
n x Sx X 0.809039835 [ MODE ] 1 [ ]
1 - VAR 2 - VAR [ ENTER ] [ DATA ] 3 [ 4[ ]5[ ]7 [ STATVAR ] ]

n x Sx [ ][ ]

X y 2.
n x Sx X y 1.414213562 [ ][ ][ ][ ] ( SRP-280 ) [ ]

y x y 1.5

Sy [ ENTER ] 6

x(6) [ ENTER ]

x(6) 4.333333333 [ DATA ] [ ]9[ ]8

X2=8 [ STATVAR ] [ ][ ]

n x Sx Xy 3.535533906

Example 39

= 1F16 = = [ MODE ] 2

Base-n d

31[ ENTER ] d31

31 [ dhbo ]

Base d h b

DHBO 31

- 12 -

DHBO 1F [ ]

Base-n h

DHBO 11111 [ ]

Base-n b

DHBO 37

Example 40
= [ MODE ] 2 [ dhbo ] [ = ] [ ] [ ][=] [ dhbo ] [ ]

Base-n b Base-n

[ ENTER ] 4777 [ ENTER ] [ ]

d4777 10101001

d4777 10010

Example 41

How is 3A 16 expressed as a negative ? Ans : FFFFFFC6 [ MODE ] 2 [ = ] [ ][=]
[ NEG ] 3 [ A ] [ ENTER ]

NEG h3A FFFFFFC6

Example 42
+ 1EF 8 = = [ dhbo ] [ ENTER ] [ ][ ][ ] [ ENTER ] [ dhbo ] [ ]

O Base-n

[ ENTER ] 1234 [ + ]

d1234 +

[ dhbo ] [

- 13 -

[ ENTER ] 1EF [ ]

1234 + h1EF /

[ ENTER ] 24

4 + h1EF / o 24

d1234 + h1EF/ 2352 [ dhbo ] [ ENTER ] [ ]

DHBO 1258

Example 43
AND ( A 16 OR 7 16) = [ dhbo ] [ ENTER ] [ ] [ ] [ ENTER ] [ dhbo ] [ ] [ ] [ ] [ ENTER ] 1010 [ AND ] [ ( ] [ dhbo ] [ ] [ ] [ ENTER ] A [ OR ] [ dhbo ] [ ] [ ] [ ENTER ] 7 [ ENTER ]