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E-4

Reading the Display

The display of the calculator shows expressions you input, calculation results, 
and various indicators.

Input expression

Calculation result

Math

Indicators

If a 

g

 indicator appears on the right side of the input expression, it means 

the displayed calculation continues to the right. Use 

e

 and 

d

 to scroll 

the input expression display. 

Display indicators 

This 
indicator:

Means this:

S

The keypad has been shifted by pressing the 

1

 key. The 

keypad will unshift and this indicator will disappear when 
you press a key.

M

There is a value stored in independent memory.

FIX

A fixed number of decimal places is in effect.

Math

Appears when natural calculation formula input (using 
the same format as a formula is written) is enabled. Also 
appears when LineO is selected as the display format.

$

`

Calculation history memory data is available and can be 
replayed, or there is more data above/below the current 
screen.

Appears when “Manual” is selected for the “Simp” setting 
on the setup menu, and indicates that the fraction result of 
a calculation can be simplified. 

Important:

 For some type of calculation that takes a long time to execute, 

the display may show only the above indicators (without any value) while it 
performs the calculation internally.

Configuring the Calculator Setup

Press 

s

 to display the setup menu. Press the number key for the item 

you want to configure. To close the setup menu without changing any setting, 
press 

A

 or 

s

.

Underlined ( ___ ) settings are initial defaults. 

1

MathO

  

2

LineO

     Specifies the display format. 

MathO displays input and calculation results using 
the same format as they are written on paper. 

LineO displays input the same way as MathO, but 
calculation results are displayed in decimal 
form.

Note:  

In this manual, the 

K

 symbol next to a sample operation indicates 

MathO, while the 

L

 symbol indicates LineO. 

Math

Math

Math

Math

Summary of Contents for FX-55 PLUS

Page 1: ...fx 55 PLUS User s Guide CASIO Worldwide Education Website http edu casio com CASIO EDUCATIONAL FORUM http edu casio com forum E ...

Page 2: ...ast 3 Key Markings 3 Reading the Display 4 Configuring the Calculator Setup 4 Inputting Expressions and Values 5 Toggling Calculation Results 8 Basic Calculations 8 Remainder Calculations 11 Function Calculations 12 Calculation Ranges Number of Digits and Precision 14 Errors 15 Before Assuming Malfunction of the Calculator 16 Replacing the Battery 17 Specifications 17 Frequently Asked Questions 17...

Page 3: ... operations see Configuring the Calculator Setup Initializing the Calculator Perform the following procedure when you want to initialize the calculator and return the setup to their initial default settings Note that this operation also clears all data currently in calculator memory r3 All Yes Safety Precautions Battery Keep batteries out of the reach of small children Use only the type of battery...

Page 4: ...ng Power On and Off Press O to turn on the calculator Press 1A OFF to turn off the calculator Auto Power Off Your calculator will turn off automatically if you do not perform any operation for about 10 minutes If this happens press the O key to turn the calculator back on Adjusting Display Contrast Display the CONTRAST screen by performing the following key operation s8 CONT Next use d and e to ad...

Page 5: ...y data is available and can be replayed or there is more data above below the current screen Appears when Manual is selected for the Simp setting on the setup menu and indicates that the fraction result of a calculation can be simplified Important For some type of calculation that takes a long time to execute the display may show only the above indicators without any value while it performs the ca...

Page 6: ... simplification of fractions When manual is specified fraction calculation results are always displayed as improper fractions even if the fraction display format setting is ab c Even if the result of a calculation can be displayed as a fraction when automatic simplification is used performing the same calculation with manual simplification may produce a non fraction decimal result Example 2 3 2 5 ...

Page 7: ...numeral symbol or function normally uses one byte Some functions require three to 13 bytes The cursor will change shape to k when there are 10 bytes or less of allowed input remaining If this happens end calculation input and then press Calculation Priority Sequence The priority sequence of input calculations is evaluated in accordance with the rules below When the priority of two expressions is t...

Page 8: ... and calculate each part separately Note When you press and obtain a calculation result part of the expression you input may be cut off If you need to view the entire input expression again press A and then use d and e to scroll the input expression Using Values and Expressions as Arguments A value or an expression that you have already input can be used as the argument of a function After you hav...

Page 9: ... F key the conversion process may take some time to perform With certain calculation results pressing the F key will not convert the displayed value You cannot switch from decimal form to mixed fraction form if the total number of digits used in the mixed fraction including integer numerator denominator and separator symbols is greater than 10 Note With MathO pressing 1 instead of after inputting ...

Page 10: ...onverted to a percent and then adjusted to the specified number of digits The number of display digits setting is not applied to the value stored in Ans memory When MathO is selected as the display format and the calculation result is a fraction root or pi π the result is converted to a decimal fraction and then to a percent Pressing again displays the decimal fraction value When the calculation r...

Page 11: ...ion history contents using f and c 1 1 2 1 1 2 2 2 4 2 2 4 3 3 6 3 3 6 Scrolls back f 4 Scrolls back again f 2 Note Calculation history data is all cleared whenever you press O when you change the display format or whenever you perform any reset operation Replay While a calculation result is on the display you can press d or e to edit the expression you used for the previous calculation 4 3 2 5 14...

Page 12: ...edure when you want to clear the contents of all memories r2 Memory Yes Remainder Calculations You can use the R function in order to obtain the quotient and remainder in a division calculation To calculate the quotient and remainder of 5 2 5u2 Quotient Remainder Note Only the quotient value of a R calculation is stored in Ans memory Assigning a remainder calculation result to independent memory M...

Page 13: ... of the form RanInt a b which generates a random integer within the range of a to b See 5 Rnd The argument of this function is made a decimal value and then rounded in accordance with the current number of display digits setting Norm or Fix With Norm 1 or Norm 2 the argument is rounded off to 10 digits With Fix the argument is rounded off to the specified digit When Fix 3 is the display digits set...

Page 14: ... three digit integers 1000r 459 48 117 Results shown here are for illustrative purposes only Actual results will differ To generate random integers in the range of 1 to 6 r RanInt 11p 6 2 6 1 Results shown here are for illustrative purposes only Actual results will differ To perform the following calculations when Fix 3 is selected for the number of display digits 10 3 3 and Rnd 10 3 3 L s3 Fix 3 ...

Page 15: ...99 1099 or 0 Number of Digits for Internal Calculation 15 digits Precision In general 1 at the 10th digit for a single calculation Precision for exponential display is 1 at the least significant digit Errors are cumulative in the case of consecutive calculations Function Calculation Input Ranges and Precision Functions Input Range 10x 9 999999999 1099 x 99 99999999 x 0 x 1 10100 x2 x 1 1050 x 1 x ...

Page 16: ...decimal form to appear in π form Errors The calculator will display an error message whenever an error occurs for any reason during a calculation There are two ways to exit an error message display Pressing d or e to display the location of the error or pressing A to clear the message and calculation Displaying the Location of an Error While an error message is displayed press d or e to return to ...

Page 17: ...er argument was input for the random number function RanInt Attempting to simplify a non fraction value Simp Action Input only integers for the argument RanInt Input only fractions for the argument Simp Can t Simplify Cause Attempting to simplify a fraction using a divisor that cannot be simplified Action Input a divisor that can be simplified Before Assuming Malfunction of the Calculator Perform ...

Page 18: ...ove step Screw Specifications Power Requirements Built in solar cell button battery LR44 GPA76 1 Approximate Battery Life 3 years based on one hour of operation per day Operating Temperature 0 C to 40 C 32 F to 104 F Dimensions 11 1 H 80 W 162 D mm 3 8 H 31 8 W 63 8 D Approximate Weight 95 g 3 4 oz including the battery Frequently Asked Questions How can I perform display results the same way I di...

Page 19: ...tial default settings Perform the following operation r1 Setup Yes Is there anything I need to remember to display a fraction calculation result as a mixed fraction On the setup menu select Auto for the Simp setting This will enable the ab c setting on the setup menu You can toggle display of a fraction between improper fraction and mixed fraction by pressing j When Manual is selected for the Simp...

Page 20: ...CASIO COMPUTER CO LTD 6 2 Hon machi 1 chome Shibuya ku Tokyo 151 8543 Japan SA1112 A 2012 CASIO COMPUTER CO LTD ...

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