Casio FX 83 ES Calculator

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Example: (2 + 3) × (4 – 1) = 15 LINE (2+3)* (4-1= k Fraction Calculations How you should input fractions depends on the input/output format that is currently selected. Improper Fraction Math Format Linear Format Mixed Fraction 7 3 2 1 3 ('7c3) (1'(()2e1c3) 7{3 2{1{3 Numerator Denominator Integer Part (7'3) Denominator Numerator (2'1'3) • Under initial default settings, fractions are displayed as improper fractions. • Fraction calculation results are always reduced before being displayed. Math e+1 Example 2: To input 1 + ' 2+3 MATH Math 1+!2 Math e+3 Example 3: To input (1 + 2 2 ) ×2= 5 MATH Math (1+'2c5e) w*2= • When you press = and obtain a calculation result using Math format, part of the expression you input can be cut off as shown in the Example 3 screen shot. If you need to view the entire input expression again, press A and then press e. With Math format, you can only use the insert mode. Pressing 1Y(INS) when the Math format is selected does not switch to the overwrite mode. See “Incorporating a Value into a Function” for more information. • The calculator automatically changes to the insert mode whenever you change the input/output format from Linear to Math. The cursor key is marked with four arrows, indicating direction, as shown in the illustration nearby. In this User’s Guide, cursor key operation is indicated as f, c, d, and e. REPLAY • The displays and illustrations (such as key markings) shown in this User’s Guide and the separate Appendix are for illustrative purposes only, and may differ somewhat from the actual items they represent. • The contents of this manual are subject to change without notice. • In no event shall CASIO Computer Co., Ltd.

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With its compact and lightweight design, the FX-83ES is highly portable, making it ideal for students and professionals on the go. It comes with a protective hard case, ensuring that it remains safe and secure during transportation.Sexagesimal Calculations • Performing the following types of sexagesimal calculations produces a sexagesimal result. - Addition or subtraction of two sexagesimal values - Multiplication or division of a sexagesimal value and a decimal value Appendix <#012> 2°20´30˝ + 39´30˝ = 3°00´00˝ Converting Values between Sexagesimal and Decimal Pressing e while a calculation result is displayed toggles the value between sexagesimal and decimal. Appendix <#013> Convert 2.255 to its sexagesimal equivalent. Safety Precautions Be sure to read the following safety precautions before using this calculator. Keep this manual handy for later reference. Caution This symbol is used to indicate information that can result in personal injury or material damage if ignored. Battery • After removing the battery from the calculator, put it in a safe place where it will not get into the hands of small children and accidentally swallowed. • Keep batteries out of the reach of small children. Inputting Answer Memory Contents into an Expression Example: To perform the calculations shown below: 123 + 456 = 579 789 – 579 = 210 LINE 123+456= 789-G= k Independent Memory (M) You can add calculation results to or subtract results from independent memory. The “M” appears on the display when independent memory contains a value. Independent Memory Overview • The following is a summary of the different operations you can perform using independent memory. Using Calculator Memory Memory Name Description Answer Memory Stores the last calculation result obtained. Independent Memory Calculation results can be added to or subtracted from independent memory. The “M” display indicator indicates data in independent memory. Variables Six variables named A, B, C, D, X, and Y can be used for storage of individual values. This section uses the COMP Mode (N1) to demonstrate how you can use memory.

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k Inputting with Math Format When inputting with Math format, you can input and display fractions and some functions using the same format as they appear in your textbook. Important! • Certain types of expressions can cause the height of a calculation formula to be greater than one display line. The maximum allowable height of a calculation formula is two display screens (31 dots × 2). Further input will become impossible if the height of the calculation you are inputting exceeds the allowable limit. Handling Precautions • Be sure to press the O key before using the calculator for the first time. • Even if the calculator is operating normally, replace the battery at least once every three years (LR44 (GPA76)), two years (R03 (UM-4)), or one year (LR03 (AM4)). A dead battery can leak, causing damage to and malfunction of the calculator. Never leave a dead battery in the calculator. • The battery that comes with this unit discharges slightly during shipment and storage. Example: 2' 3 × 4 = 8' 3 ' form 35' 2 × 3 = 148.492424 (= 105' 2) decimal form 150' 2 = 8.485281374 25 2 × (3 – 2' 5 ) = 6 – 4' 5 ' form 23 × (5 – 2' 3 ) = 35.32566285 (= 115 – 46' 3) decimal form 10' 2 + 15 × 3' 3 = 45' 3 + 10' 2 ' form 15 × (10' 2 + 3' 3 ) = 290.0743207 (= 45' 3 + 150' 2) decimal form ' 2+' 3+' 8=' 3 + 3' 2 ' 2+' 3+' 6 = 5.595754113 ' form decimal form The underlined areas in the above examples indicate what caused decimal form to be used. Calculation Examples Using Independent Memory • If the “M” indicator is on the display, perform the procedure under “Clearing Independent Memory” before performing this example. Example: 23 + 9 = 32 23+9m 53 – 6 = 47 53-6m –)45 × 2 = 90 45*21m(M–) 99 ÷ 3 = 33 99/3m (Total) 22 tm(M) Clearing Independent Memory Press01t(STO)m. This clears independent memory and causes the “M” indicator to disappear from the display. If you have a Casio fx-83ES that is no longer working, you can first try replacing the AAA battery. If that doesn't solve the problem, then you can consider replacing the calculator with a modern equivalent.

Replacements:

dddY s Overwrite Mode: c60) dddd s Inserting Input into a Calculation Always use the insert mode for this operation. Use d or e to move the cursor to the location where you want to insert new input, and then input what you want. k Displaying the Location of an Error If an error message (like “Math ERROR” or “Syntax ERROR”) appears when you press =, press d or e. This will display the part of the calculation where the error occurred, with the cursor positioned at the error location.

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Inputting Expressions and Values k Inputting a Calculation Expression Using Standard Format Your calculator lets you input calculation expressions just as they are written. Then simply press the = key to execute it. The calculator automatically judges the calculation priority sequence for addition, subtraction, multiplication, and division, functions, and parentheses.Specifying the Fraction Display Format To specify this fraction display format: Perform this key operation: Mixed 1Nc1(ab/c) Improper 1Nc2(d/c) Specifying the Statistical Display Format Use the following procedure to turn display of the frequency (FREQ) column of the STAT Mode STAT editor screen on or off. k About the Display Your calculator has a 31-dot × 96-dot LCD screen. Example: Input expression Calculation result { k Display Indicators Sample Display: This indicator: STAT 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. A The alpha input mode has been entered by pressing the S key. The alpha input mode will be exited and this indicator will disappear when you press a key. Basic Calculations (COMP) This section explains how to perform arithmetic, fraction, percent, and sexagesimal calculations. All calculations in this section are performed in the COMP Mode (N1). k Arithmetic Calculations Use the +, -, *, and / keys to perform arithmetic calculations. Example: 7 × 8 – 4 × 5 = 36 LINE 7*8-4*5= • The calculator automatically judges the calculation priority sequence. For more information, see “Calculation Priority Sequence”. Displaying a Long Expression The display can show up to 14 characters at a time. Inputting the 15th character causes the expression to shift to the left. At this time, the ] indicator appears to the left of the expression, indicating that it runs off the left side of the screen. Input expression: 1111 + 2222 + 3333 + 444 Math Displayed portion: Cursor • When the ] indicator is displayed, you can scroll left and view the hidden part by pressing the d key.