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... Precautions • Your calculator is brought back to normal temperature. • The display will go blank and keys will the manufacturer and its suppliers be sure to take it apart. • Avoid dropping your key operations are being performed correctly. • Never leave the dead battery (fx-85B/fx-280) in a solution of malfunction, repairs, or battery replacement (fx-85B/fx280), or insufficient...
... Precautions • Your calculator is brought back to normal temperature. • The display will go blank and keys will the manufacturer and its suppliers be sure to take it apart. • Avoid dropping your key operations are being performed correctly. • Never leave the dead battery (fx-85B/fx-280) in a solution of malfunction, repairs, or battery replacement (fx-85B/fx280), or insufficient...
User Manual
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... low battery power (fx-85B/fx-280) or operational error. • The contents of this manual are subject to change without notice. • No part of this manual may be reproduced in any form without the express written consent of display indicator indicates COMP Mode. - 3 - Modes Application Key Mode Operation Name* Standard deviation calculations Fl SD Normal calculations Calculations using degrees F0 F4 COMP DEG Calculations using radians Calculations using grads F5 RAD F6 GRA Number of decimal place specification F7 FIX Number of significant digit specification...
... low battery power (fx-85B/fx-280) or operational error. • The contents of this manual are subject to change without notice. • No part of this manual may be reproduced in any form without the express written consent of display indicator indicates COMP Mode. - 3 - Modes Application Key Mode Operation Name* Standard deviation calculations Fl SD Normal calculations Calculations using degrees F0 F4 COMP DEG Calculations using radians Calculations using grads F5 RAD F6 GRA Number of decimal place specification F7 FIX Number of significant digit specification...
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Note! • A mode guide is located at the top of the display screen. • DEG, RAD, and GRA modes can be used in combination with COMP and SD modes. • F9 does not exit SD mode. • F0 exits SD mode. • F0 does not clear SCI or FIX specifications. • Always press t before entering DEG, RAD, and GRA modes. • Remember to always set the operating mode and angular unit (DEG, RAD, GRA) before starting your calculation. - 4 -
Note! • A mode guide is located at the top of the display screen. • DEG, RAD, and GRA modes can be used in combination with COMP and SD modes. • F9 does not exit SD mode. • F0 exits SD mode. • F0 does not clear SCI or FIX specifications. • Always press t before entering DEG, RAD, and GRA modes. • Remember to always set the operating mode and angular unit (DEG, RAD, GRA) before starting your calculation. - 4 -
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O 5+ 4PP = 122. • You can skip all P operations before the = key. - 5 - Basic Calculations • Use the COMP mode for basic calculations. • Example 1: 23ѿ4.5Ҁ53 23 + 4.5 , 53 = -25.5 • Example 2: 56҂(Ҁ12)Ö(Ҁ2.5) 56 -12 E \ 2.5 E = 268.8 • Example 3: 2Ö3҂(1҂1020) 2 \ 3 -1 e 20 = 6.66666666719 • Example 4: 7҂8Ҁ4҂5=36 7 - 8 , 4 - 5 = 36. • Example 5: 6 4҂5 =0.3 4 -5 \ 6AN = 0.3 • Example 6: 2҂[7ѿ6҂(5ѿ4)]҃122 2 - O 7 + 6 -
O 5+ 4PP = 122. • You can skip all P operations before the = key. - 5 - Basic Calculations • Use the COMP mode for basic calculations. • Example 1: 23ѿ4.5Ҁ53 23 + 4.5 , 53 = -25.5 • Example 2: 56҂(Ҁ12)Ö(Ҁ2.5) 56 -12 E \ 2.5 E = 268.8 • Example 3: 2Ö3҂(1҂1020) 2 \ 3 -1 e 20 = 6.66666666719 • Example 4: 7҂8Ҁ4҂5=36 7 - 8 , 4 - 5 = 36. • Example 5: 6 4҂5 =0.3 4 -5 \ 6AN = 0.3 • Example 6: 2҂[7ѿ6҂(5ѿ4)]҃122 2 - O 7 + 6 -
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A x - 5 A N = 523.5987756 Constant Calculations • Press +, ,, - or \ twice after inputting a number to make that number a constant. • "K" is on the display while a constant is being used. • Use the COMP mode for constant calculations. • Example 1: 2.3ѿ3, then 2.3ѿ6 (2.3ѿ3) 2.3 + + 3 = (2.3ѿ6) 6 = K 5.3 K 8.3 • Example 2: 12҂2.3, then 12҂(ȕ9) (12҂2.3) 12 - - 2.3 = (12҂(ȕ9)) 9 E = K 27.6 K -108. • Example 3: ...
A x - 5 A N = 523.5987756 Constant Calculations • Press +, ,, - or \ twice after inputting a number to make that number a constant. • "K" is on the display while a constant is being used. • Use the COMP mode for constant calculations. • Example 1: 2.3ѿ3, then 2.3ѿ6 (2.3ѿ3) 2.3 + + 3 = (2.3ѿ6) 6 = K 5.3 K 8.3 • Example 2: 12҂2.3, then 12҂(ȕ9) (12҂2.3) 12 - - 2.3 = (12҂(ȕ9)) 9 E = K 27.6 K -108. • Example 3: ...
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• Example 4: 1.74҃8.3521 (1.7 2) 1.7 - - = (1.7 3) = (1.7 4) = K 2.89 K 4.913 K 8.3521 Memory Calculations • Use the COMP mode for memory calculations. • Use A Y, |, A { and Z for memory calculations. A Y replaces current memory contents. • "M" appears when there is a value in memory. • To clear memory, press 0 A Y or t A Y. • Example 1: (53ѿ6)ѿ(23Ҁ8)ѿ(56҂2)ѿ(99Ö4)҃210.75 (53ѿ6) 53 + 6 = A Y M 59. (23ȕ8) 23 , 8 | M ...
• Example 4: 1.74҃8.3521 (1.7 2) 1.7 - - = (1.7 3) = (1.7 4) = K 2.89 K 4.913 K 8.3521 Memory Calculations • Use the COMP mode for memory calculations. • Use A Y, |, A { and Z for memory calculations. A Y replaces current memory contents. • "M" appears when there is a value in memory. • To clear memory, press 0 A Y or t A Y. • Example 1: (53ѿ6)ѿ(23Ҁ8)ѿ(56҂2)ѿ(99Ö4)҃210.75 (53ѿ6) 53 + 6 = A Y M 59. (23ȕ8) 23 , 8 | M ...
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...;3)҃135. (12҂3) (45҂3) (78҂3) (Memory recall) 3 - - 12 = A Y 45 A { 78 | Z MK 36. MK 234. kAdditional fx-85B/fx-280 Memory Calculations • The fx-85B/fx-280 has two additional memories named A and B. • Use A J to store data and 0 to recall data. • Storing data in a memory replaces anything stored there previously. • To clear a memory, store a zero in it. • Example 1: To input 123 in memory A. MK 135.
...;3)҃135. (12҂3) (45҂3) (78҂3) (Memory recall) 3 - - 12 = A Y 45 A { 78 | Z MK 36. MK 234. kAdditional fx-85B/fx-280 Memory Calculations • The fx-85B/fx-280 has two additional memories named A and B. • Use A J to store data and 0 to recall data. • Storing data in a memory replaces anything stored there previously. • To clear a memory, store a zero in it. • Example 1: To input 123 in memory A. MK 135.
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...8226; Use COMP mode for fraction calculations. • Total number of 123 ҂ 456 in memory B. t 123 - 456 A J 2 56088. t 0 2 56088. t 0 1 123. • Example 2: To store the results of digits (including division marks) cannot exceed 10. • Example 1: 2 3 ѿ 4 5 ҃1175 2 C 3 + 4 C 5 = 1 7 15. • Example 2: 3 1 4 ѿ1 2 3 ҃4 11 12 3 C 1 C 4 + 1 C 2 C 3 = 4 11 12. • Example 3: 2 4 ҃ 1 2 2 C 4 = • Example 4: 1 2 ѿ1.6҃2.1 1 C 2 + 1.6 = 2 4. 1 2. 2.1 Fraction/decimal calculation result...
...8226; Use COMP mode for fraction calculations. • Total number of 123 ҂ 456 in memory B. t 123 - 456 A J 2 56088. t 0 2 56088. t 0 1 123. • Example 2: To store the results of digits (including division marks) cannot exceed 10. • Example 1: 2 3 ѿ 4 5 ҃1175 2 C 3 + 4 C 5 = 1 7 15. • Example 2: 3 1 4 ѿ1 2 3 ҃4 11 12 3 C 1 C 4 + 1 C 2 C 3 = 4 11 12. • Example 3: 2 4 ҃ 1 2 2 C 4 = • Example 4: 1 2 ѿ1.6҃2.1 1 C 2 + 1.6 = 2 4. 1 2. 2.1 Fraction/decimal calculation result...
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... enter the SD Mode for statistical calculations using the numbers 1 through 7. 7 A m 4 = 840. Enter SD Mode. θ A N RAD 1.047197551 kPermutation • Example: To determine how many different 4-member groups can be organized in a group of 10 individuals. 10 A n 4 = 210. kCombination • Example: To determine how many different 4-digit values can be produced using standard deviation. • If FIX or SCI is on the display, press F 9 first. • Data input always...
... enter the SD Mode for statistical calculations using the numbers 1 through 7. 7 A m 4 = 840. Enter SD Mode. θ A N RAD 1.047197551 kPermutation • Example: To determine how many different 4-member groups can be organized in a group of 10 individuals. 10 A n 4 = 210. kCombination • Example: To determine how many different 4-digit values can be produced using standard deviation. • If FIX or SCI is on the display, press F 9 first. • Data input always...
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All clear t Sign change E • Memory Memory in A Y Memory minus A { Memory plus Memory recall Z • fx-85B/fx-280 Memory Memory A recall 0 1 Memory B recall 0 2 Memory M recall 0 3 Memory A store A J 1 - 21 - Technical Information kKeys and Their Functions • General Arithmetic calculations Backspace Q Clear(retains memory k Number input 0 - 9, l Power on;
All clear t Sign change E • Memory Memory in A Y Memory minus A { Memory plus Memory recall Z • fx-85B/fx-280 Memory Memory A recall 0 1 Memory B recall 0 2 Memory M recall 0 3 Memory A store A J 1 - 21 - Technical Information kKeys and Their Functions • General Arithmetic calculations Backspace Q Clear(retains memory k Number input 0 - 9, l Power on;
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...than 10 digits and decimal values with more than two decimal places. • NORM 2 With NORM 2, exponential notation is automatically used for integer values with more than 10 digits and decimal values with more than nine decimal places. - 24 - • Statistics (SD Mode) Arithmetic mean A ` Data delete A [ Data input Number of data A r Population standard deviation A p Sample standard deviation A q Statistical register clear A u Sum of squares of values A a Sum of decimal value, you can display up to 10 digits. Larger values are automatically displayed using exponential notation...
...than 10 digits and decimal values with more than two decimal places. • NORM 2 With NORM 2, exponential notation is automatically used for integer values with more than 10 digits and decimal values with more than nine decimal places. - 24 - • Statistics (SD Mode) Arithmetic mean A ` Data delete A [ Data input Number of data A r Population standard deviation A p Sample standard deviation A q Statistical register clear A u Sum of squares of values A a Sum of decimal value, you can display up to 10 digits. Larger values are automatically displayed using exponential notation...
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... did not yet press an operator key), use Q to clear the input entirely and start again. - 25 - There is no indication on the display of the examples in this manual show calculation results using the NORM 1 format. F 9 (NORM mode) 4. F 4 (DEG mode) 3. To switch between NORM 1 and NORM 2 Press F 9. kMaking Corrections During Calculations • If you can determine the setting by -one -by performing the following steps. 1.
... did not yet press an operator key), use Q to clear the input entirely and start again. - 25 - There is no indication on the display of the examples in this manual show calculation results using the NORM 1 format. F 9 (NORM mode) 4. F 4 (DEG mode) 3. To switch between NORM 1 and NORM 2 Press F 9. kMaking Corrections During Calculations • If you can determine the setting by -one -by performing the following steps. 1.
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... ҂ 1099. ("-E-" indicator appears on the display.) b. a. When function calculations are used , but the operation retains the order of precedence of the operation for the first key you just pressed, simply press the correct operator key. In this case, the operator of the last key you press is performed. ("-E-" indicator appears on the display.) • To clear any of the above conditions, press t and...
... ҂ 1099. ("-E-" indicator appears on the display.) b. a. When function calculations are used , but the operation retains the order of precedence of the operation for the first key you just pressed, simply press the correct operator key. In this case, the operator of the last key you press is performed. ("-E-" indicator appears on the display.) • To clear any of the above conditions, press t and...
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... to operate even in total darkness. • The calculator retains memory contents no matter what the lighting conditions. • The TWO-WAY POWER system uses two power sources: a solar cell and a single G13 Type (SR44 or LR44) battery. • Weak battery power is powered by pressing 5. - 27 - WAY POWER system, which makes it possible for the calculator to an area with the calculation from that converts available...
... to operate even in total darkness. • The calculator retains memory contents no matter what the lighting conditions. • The TWO-WAY POWER system uses two power sources: a solar cell and a single G13 Type (SR44 or LR44) battery. • Weak battery power is powered by pressing 5. - 27 - WAY POWER system, which makes it possible for the calculator to an area with the calculation from that converts available...
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... batteries can see it in place, and then remove the cover. 2. Incorrect use of all important data. • Always be sure to become corrupted or lost completely. Remove the screws that comes with your physician immediately. Install a new battery, making sure that the positive (ѿ) side is used. To replace the battery 1. Old batteries may not provide full service life. • Low bettery power can cause memory...
... batteries can see it in place, and then remove the cover. 2. Incorrect use of all important data. • Always be sure to become corrupted or lost completely. Remove the screws that comes with your physician immediately. Install a new battery, making sure that the positive (ѿ) side is used. To replace the battery 1. Old batteries may not provide full service life. • Low bettery power can cause memory...
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... up to 18 times. • Example: The following operation uses 4 levels and 5 nested parentheses. 2-O OO3 +4 -OO5 +4 The table on . xy, x1/y, R →P, P →R, nPr, nCr 3. ҂, Ȗ 4. ѿ, Ҁ • Operations with operations enclosed in parentheses per- 5. edence. 1. formed first. kOrder of Operations and Levels Operations are performed in the innermost set of prec- closed in the following the above input. - 29 - Functions 2.
... up to 18 times. • Example: The following operation uses 4 levels and 5 nested parentheses. 2-O OO3 +4 -OO5 +4 The table on . xy, x1/y, R →P, P →R, nPr, nCr 3. ҂, Ȗ 4. ѿ, Ҁ • Operations with operations enclosed in parentheses per- 5. edence. 1. formed first. kOrder of Operations and Levels Operations are performed in the innermost set of prec- closed in the following the above input. - 29 - Functions 2.
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The calculation range is the same for radians and grads. Coordinate Transformation • With polar coordinates, θ can be calculated within a range of -180° θ ͨ 180°. Register Contents x4 L1 (( 5 ѿ L 2 4 ҂ L3 ((( 3 ѿ L4 2 ҂ L 5 L6 kFormulas, Ranges, and Conventions The following are the formulas, ranges, and conventions that are applied to various calculations that can be performed using this calculator. Y Y P (x, y) P (r, θ ) Pol r y Rec θ 0 x X 0 X - 30 -
The calculation range is the same for radians and grads. Coordinate Transformation • With polar coordinates, θ can be calculated within a range of -180° θ ͨ 180°. Register Contents x4 L1 (( 5 ѿ L 2 4 ҂ L3 ((( 3 ѿ L4 2 ҂ L 5 L6 kFormulas, Ranges, and Conventions The following are the formulas, ranges, and conventions that are applied to various calculations that can be performed using this calculator. Y Y P (x, y) P (r, θ ) Pol r y Rec θ 0 x X 0 X - 30 -
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kSpecifications Power Supply : fx-82SOLAR/fx-260SOLAR : Solar cell fx-85B/fx-280 : CASIO TWO-WAY POWER System: solar cell plus one G13 Type (SR44 or LR44) batter y Battery Life (fx-85B/fx-280) : Approximately 3 years (1 hour use per day) on LR44/SR44 battery Input Ranges : Functions Input Range sinx cosx tanx (DEG) ȊxȊ9҂...522;ͨ 1 tan-1x ȊxȊ 1 ҂ 10100 sinhx coshx tanhx ȊxȊͨ 230.2585092 ȊxȊ 1҂ 10100 For sinh and tanh,errors are cumulative and accuracy is affected at a certain point when x=0. sinh-1x...
kSpecifications Power Supply : fx-82SOLAR/fx-260SOLAR : Solar cell fx-85B/fx-280 : CASIO TWO-WAY POWER System: solar cell plus one G13 Type (SR44 or LR44) batter y Battery Life (fx-85B/fx-280) : Approximately 3 years (1 hour use per day) on LR44/SR44 battery Input Ranges : Functions Input Range sinx cosx tanx (DEG) ȊxȊ9҂...522;ͨ 1 tan-1x ȊxȊ 1 ҂ 10100 sinhx coshx tanhx ȊxȊͨ 230.2585092 ȊxȊ 1҂ 10100 For sinh and tanh,errors are cumulative and accuracy is affected at a certain point when x=0. sinh-1x...
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... x ҃ 0: y Œ 0 x1/y x 0: y҃ 2nѿ1; 1 n (n ≠ 0; Functions Input Range x Œ 0: -1҂10100 y log x 100 x ҃ 0: y Œ 0 xy x 0: y ҃ n; 1 2nѿ1 (n is an integer) However: -1҂10100 1/y log ȊxȊ100 Total of integer, numerator, and denominator a b/c must be 10 digits or less(including division marks). ȊxȊ 1҂...
... x ҃ 0: y Œ 0 x1/y x 0: y҃ 2nѿ1; 1 n (n ≠ 0; Functions Input Range x Œ 0: -1҂10100 y log x 100 x ҃ 0: y Œ 0 xy x 0: y ҃ n; 1 2nѿ1 (n is an integer) However: -1҂10100 1/y log ȊxȊ100 Total of integer, numerator, and denominator a b/c must be 10 digits or less(including division marks). ȊxȊ 1҂...
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Operating Temperature: 0°C-40°C (32°F-104°F) Dimensions: fx-82SOLAR/fx-260SOLAR: 8(H)i66.5(W)i125(D) mm 5/16"(H)i2-5/8"(W)i4-15/16"(D) fx-85B/fx-280: 13.5(H)i73(W)i144.5(D) mm 1/2"(H)i2-7/8"(W)i5-5/8"(D) Weight: fx-82SOLAR/fx-260SOLAR: 47 g (1.7oz) fx-85B/fx-280: 67 g (2.4oz) including battery Calculation Capacity: • Input/ Basic Calculations 10-digit mantissa; or 10-digit mantissa plus 2-digit exponent up to 10±99 - 35 -
Operating Temperature: 0°C-40°C (32°F-104°F) Dimensions: fx-82SOLAR/fx-260SOLAR: 8(H)i66.5(W)i125(D) mm 5/16"(H)i2-5/8"(W)i4-15/16"(D) fx-85B/fx-280: 13.5(H)i73(W)i144.5(D) mm 1/2"(H)i2-7/8"(W)i5-5/8"(D) Weight: fx-82SOLAR/fx-260SOLAR: 47 g (1.7oz) fx-85B/fx-280: 67 g (2.4oz) including battery Calculation Capacity: • Input/ Basic Calculations 10-digit mantissa; or 10-digit mantissa plus 2-digit exponent up to 10±99 - 35 -
