User Manual
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Correct operation will resume once the calculator is made up of malfunction, repairs, or battery replacement (fx-85B/fx280), or insufficient light. The user should prepare physical records of data to protect against such data loss. • Never dispose of battery (fx-85B/fx-280), the liquid crystal panel, ... amounts of the unit, be liable to you are being performed correctly. • Never leave the dead battery (fx-85B/fx-280) in the battery compartment. When exposed to low temperatures, the calculator may require more time to display results and may even fail to clean the unit.
Correct operation will resume once the calculator is made up of malfunction, repairs, or battery replacement (fx-85B/fx280), or insufficient light. The user should prepare physical records of data to protect against such data loss. • Never dispose of battery (fx-85B/fx-280), the liquid crystal panel, ... amounts of the unit, be liable to you are being performed correctly. • Never leave the dead battery (fx-85B/fx-280) in the battery compartment. When exposed to low temperatures, the calculator may require more time to display results and may even fail to clean the unit.
User Manual
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fully reread this manual and ensure that the problem is not due to 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... express written consent of significant digit specification F8 SCI Cancels FIX and SCI settings F9 NORM * Display indicators show current mode setting. 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 ...
fully reread this manual and ensure that the problem is not due to 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... express written consent of significant digit specification F8 SCI Cancels FIX and SCI settings F9 NORM * Display indicators show current mode setting. 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 ...
User Manual
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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 -
User Manual
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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 -
User Manual
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... 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... + + = (17ѿ17 ѿ17) = (17ѿ17 ѿ17ѿ17) = - 6 - A x - 5 A N = 523.5987756 Constant Calculations • Press +, ,, - • Example 7: 4/3π53 4 \ 3 - K 68. K 34.
... 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... + + = (17ѿ17 ѿ17) = (17ѿ17 ѿ17ѿ17) = - 6 - A x - 5 A N = 523.5987756 Constant Calculations • Press +, ,, - • Example 7: 4/3π53 4 \ 3 - K 68. K 34.
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....75 (53ѿ6) 53 + 6 = A Y M 59. (23ȕ8) 23 , 8 | M 15. (56҂2) 56 - 2 | M 112. (99Ȗ4) 99 \ 4 | M 24.75 (Memory recall) Z M 210.75 • Example 2: To calculate the following using memory as shown. - 7 - • 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...
....75 (53ѿ6) 53 + 6 = A Y M 59. (23ȕ8) 23 , 8 | M 15. (56҂2) 56 - 2 | M 112. (99Ȗ4) 99 \ 4 | M 24.75 (Memory recall) Z M 210.75 • Example 2: To calculate the following using memory as shown. - 7 - • 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...
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MK 135. 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 .... • To clear a memory, store a zero in it. • Example 1: To input 123 in memory A. MK 234. t 123 A J 1 123. - 8 - MK 135. M 13. • Example 3: To calculate the following using memory and a constant: (12҂3)ȕ(45҂3)ѿ(78҂3)҃135. (12҂3) (45҂3) (78҂3) (Memory recall) 3 - - 12...
MK 135. 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 .... • To clear a memory, store a zero in it. • Example 1: To input 123 in memory A. MK 234. t 123 A J 1 123. - 8 - MK 135. M 13. • Example 3: To calculate the following using memory and a constant: (12҂3)ȕ(45҂3)ѿ(78҂3)҃135. (12҂3) (45҂3) (78҂3) (Memory recall) 3 - - 12...
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... of 123 ҂ 456 in memory B. 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 is always decimal. - 9 - t 123 - 456 A J 2 56088.
... of 123 ҂ 456 in memory B. 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 is always decimal. - 9 - t 123 - 456 A J 2 56088.
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Percentage Calculations • Use COMP mode for percentage calculations. • Example 1: To calculate 12% of 1500. 1500 - 12 A v 180. • Example 2: To calculate what percentage of 880 is 660. 660 \ 880 A v 75. • Example 3: To add 15% onto 2500. 2500 - 15 A v + - 10 - 2875. • Example 5: 1 2 ↔ 0.5(Fraction ↔Decimal) 1 C 2 = C C • Example 6: 1 2 3 ↔ 5 3 1C 2C 3 A B A B 1 2. 0.5 1 2. 1 2 3. 5 3. 1 2 3.
Percentage Calculations • Use COMP mode for percentage calculations. • Example 1: To calculate 12% of 1500. 1500 - 12 A v 180. • Example 2: To calculate what percentage of 880 is 660. 660 \ 880 A v 75. • Example 3: To add 15% onto 2500. 2500 - 15 A v + - 10 - 2875. • Example 5: 1 2 ↔ 0.5(Fraction ↔Decimal) 1 C 2 = C C • Example 6: 1 2 3 ↔ 5 3 1C 2C 3 A B A B 1 2. 0.5 1 2. 1 2 3. 5 3. 1 2 3.
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...;25'36" + 12°23'34" = 26°49'10" 14 I 25 I 36 I + 12 I 23 I 34 I = 26°49°10. - 11 - Scientific Function Calculations • Use COMP mode for scientific function calculations. • Some calculations may take a long time to complete. • Wait for result before starting next calculation. • =3.1415926536. • Example 4: To discount 3500...
...;25'36" + 12°23'34" = 26°49'10" 14 I 25 I 36 I + 12 I 23 I 34 I = 26°49°10. - 11 - Scientific Function Calculations • Use COMP mode for scientific function calculations. • Some calculations may take a long time to complete. • Wait for result before starting next calculation. • =3.1415926536. • Example 4: To discount 3500...
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F 7 2 1.234 A b + 1.234 A b = • Press F 9 to clear SCI specification. - 16 - FIX 2.46 • Example 3: 1Ö 3 , displaying result with two significant digits (SCI 2). F 8 2 SCI 0.0 00 1 \3 = SCI 3.3-01 • Press F 9 to clear FIX specification. kFIX, SCI, NORM, RND, RAN#, ENG Calculations • Example 1: 1.234ѿ1.234, rounding result to two places. • Example 5: 8! 8 Af 40320. F 7 2 FIX 0.00 1.234 +1.234 = FIX 2.47 • Example 2: 1.234ѿ1.234, rounding input to two places (FIX 2).
F 7 2 1.234 A b + 1.234 A b = • Press F 9 to clear SCI specification. - 16 - FIX 2.46 • Example 3: 1Ö 3 , displaying result with two significant digits (SCI 2). F 8 2 SCI 0.0 00 1 \3 = SCI 3.3-01 • Press F 9 to clear FIX specification. kFIX, SCI, NORM, RND, RAN#, ENG Calculations • Example 1: 1.234ѿ1.234, rounding result to two places. • Example 5: 8! 8 Af 40320. F 7 2 FIX 0.00 1.234 +1.234 = FIX 2.47 • Example 2: 1.234ѿ1.234, rounding input to two places (FIX 2).
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... 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. Enter SD Mode. F l SD 0. - 18 - Statistical Calculations (SD Mode) • Press F l to enter the SD Mode for the following data : 55, 54, 51,... 55, 53, 53, 54, 52. kCombination • Example: To determine how many different 4-digit values ...
... 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. Enter SD Mode. F l SD 0. - 18 - Statistical Calculations (SD Mode) • Press F l to enter the SD Mode for the following data : 55, 54, 51,... 55, 53, 53, 54, 52. kCombination • Example: To determine how many different 4-digit values ...
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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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...of values A o kExponential Display Formats This calculator can select between two formats that determine at what point exponential notation is used. • NORM 1 With NORM 1, exponential notation is automatically used for integer values with more 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 [...
...of values A o kExponential Display Formats This calculator can select between two formats that determine at what point exponential notation is used. • NORM 1 With NORM 1, exponential notation is automatically used for integer values with more 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 [...
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... determine the setting by -one. F 0 (COMP mode) 2. Enter the correct modes to clear the input entirely and start again. - 25 - If calculation results are working with to backspace and delete input digits one-by performing the following steps. 1. F 9 (NORM mode) 4. F 4 (DEG mode) 3. Check the formula you make a mistake when inputting a value (but...
... determine the setting by -one. F 0 (COMP mode) 2. Enter the correct modes to clear the input entirely and start again. - 25 - If calculation results are working with to backspace and delete input digits one-by performing the following steps. 1. F 9 (NORM mode) 4. F 4 (DEG mode) 3. Check the formula you make a mistake when inputting a value (but...
User Manual
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... (whether intermediate or final) or a total accumulated in memor y is performed. ("-E-" indicator appears on display.) e. 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...kOverflow or Error Check The following conditions make further calculation impossible. • In a series of calculations, press k while an intermediate result is displayed to calculate o and σn while n ҃ 0) is performed during statistical calculations. ("-E-" indicator appears on the display.) d. When ...
... (whether intermediate or final) or a total accumulated in memor y is performed. ("-E-" indicator appears on display.) e. 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...kOverflow or Error Check The following conditions make further calculation impossible. • In a series of calculations, press k while an intermediate result is displayed to calculate o and σn while n ҃ 0) is performed during statistical calculations. ("-E-" indicator appears on the display.) d. When ...
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... be lost. kPower Supply • fx-82SOLAR/fx-260SOLAR This calculator is powered by a solar cell that point. •... No error occurs when the result is within the range of ѿ(1҂10Ҁ99)to an area with the calculation from that converts available light into electrical power. WAY POWER system, which makes it possible for the calculator...continue with more light. • fx-85B/fx-280 This calculator is too low, the display may become dim, calculation functions may become impossible, or the...
... be lost. kPower Supply • fx-82SOLAR/fx-260SOLAR This calculator is powered by a solar cell that point. •... No error occurs when the result is within the range of ѿ(1҂10Ҁ99)to an area with the calculation from that converts available light into electrical power. WAY POWER system, which makes it possible for the calculator...continue with more light. • fx-85B/fx-280 This calculator is too low, the display may become dim, calculation functions may become impossible, or the...
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...provide full service life. • Low bettery power can see it in place, and then remove the cover. 2. If swallowed, consult with the calculator when you can cause them to the interior of small children. Keep batteries away from direct flame and heat. • Keep batteries out of ...the reach of the calculator. • The battery that the positive (ѿ) side is for testing only. It may leak, causing serious damage to become corrupted or lost...
...provide full service life. • Low bettery power can see it in place, and then remove the cover. 2. If swallowed, consult with the calculator when you can cause them to the interior of small children. Keep batteries away from direct flame and heat. • Keep batteries out of ...the reach of the calculator. • The battery that the positive (ѿ) side is for testing only. It may leak, causing serious damage to become corrupted or lost...
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... parentheses are performed first. • Registers L through L store operations.There are performed from left to right, with the same precedence are six reg- 1 6 isters, so calculations up to six levels can be stored. • Each level can contain up to three open parentheses, so parentheses can be nested up to turn...
... parentheses are performed first. • Registers L through L store operations.There are performed from left to right, with the same precedence are six reg- 1 6 isters, so calculations up to six levels can be stored. • Each level can contain up to three open parentheses, so parentheses can be nested up to turn...
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Coordinate Transformation • With polar coordinates, θ can be calculated within a range of -180° θ ͨ 180°. 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. 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.
Coordinate Transformation • With polar coordinates, θ can be calculated within a range of -180° θ ͨ 180°. 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. 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.