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...can leak and damage the unit. • Avoid using volatile liquids such as thinner or benzine to operate. 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, or other components by..., or with a cloth that all your key operations are being performed correctly. • Never leave the dead battery (fx-85B/fx-280) in the battery compartment. Handling Precautions • Your calculator is brought back to normal temperature. • The display will go blank and keys will not operate during...
...can leak and damage the unit. • Avoid using volatile liquids such as thinner or benzine to operate. 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, or other components by..., or with a cloth that all your key operations are being performed correctly. • Never leave the dead battery (fx-85B/fx-280) in the battery compartment. Handling Precautions • Your calculator is brought back to normal temperature. • The display will go blank and keys will not operate during...
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 the express written consent of ... reference. 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 F8 SCI Cancels FIX and SCI settings F9 NORM...
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 the express written consent of ... reference. 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 F8 SCI Cancels FIX and SCI settings F9 NORM...
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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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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 5+ 4PP = 122. • You can skip all P operations before the = key. - 5 - O 7 + 6 -
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 5+ 4PP = 122. • You can skip all P operations before the = key. - 5 - O 7 + 6 -
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K 34. K 51. 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... = (17ѿ17 ѿ17) = (17ѿ17 ѿ17ѿ17) = - 6 - A x - 5 A N = 523.5987756 Constant Calculations • Press +, ,, - K 68. • Example 7: 4/3π53 4 \ 3 -
K 34. K 51. 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... = (17ѿ17 ѿ17) = (17ѿ17 ѿ17ѿ17) = - 6 - A x - 5 A N = 523.5987756 Constant Calculations • Press +, ,, - K 68. • Example 7: 4/3π53 4 \ 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. • ...= 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 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. • ...= 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 -
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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 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 previously. •...
...;3)҃135. (12҂3) (45҂3) (78҂3) (Memory recall) 3 - - 12 = A Y 45 A { 78 | Z MK 36. 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 previously. •...
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t 123 - 456 A J 2 56088. t 0 2 56088. Fraction Calculations • Use COMP mode for fraction calculations. • Total number of 123 ҂ 456 in memory B. 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...
t 123 - 456 A J 2 56088. t 0 2 56088. Fraction Calculations • Use COMP mode for fraction calculations. • Total number of 123 ҂ 456 in memory B. 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...
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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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... A v K 144. K 216. K 276. kSexagesimal Functions • Example 1: 14°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...
... A v K 144. K 216. K 276. kSexagesimal Functions • Example 1: 14°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...
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• Example 2: 1°2'3" + 4.56 = 5.594166667 1 I 2 I 3 I + 4.56 = 5.594166667 • Example 3: sin 87°65'43.21" = 0.999447513 (DEG mode) 87 I 65 I 43.21 I S 0.999447513 • Example 4: 1.23↔ 1°13'48" 1.23 I I I 1°13°48. 1.23 1°13°48. • Example 5: 12°34' ↔ 12.56666667 12 I 34 I A O 12.56666667 You can also use I when inputting values to convert between sexagesimal and decimal. kTrigonometric/Inverse Trigonometric Functions • Example 1: sin ( 6 rad) (RAD mode) A x \ 6 = S RAD 0.5 - 12 -
• Example 2: 1°2'3" + 4.56 = 5.594166667 1 I 2 I 3 I + 4.56 = 5.594166667 • Example 3: sin 87°65'43.21" = 0.999447513 (DEG mode) 87 I 65 I 43.21 I S 0.999447513 • Example 4: 1.23↔ 1°13'48" 1.23 I I I 1°13°48. 1.23 1°13°48. • Example 5: 12°34' ↔ 12.56666667 12 I 34 I A O 12.56666667 You can also use I when inputting values to convert between sexagesimal and decimal. kTrigonometric/Inverse Trigonometric Functions • Example 1: sin ( 6 rad) (RAD mode) A x \ 6 = S RAD 0.5 - 12 -
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... groups can be organized in a group of 10 individuals. 10 A n 4 = 210. 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 can be produced using standard deviation. • If FIX or SCI...
... groups can be organized in a group of 10 individuals. 10 A n 4 = 210. 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 can be produced using standard deviation. • If FIX or SCI...
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To input the data 110 ten times, for example, press 110 -10 }. • The above . • To delete data you have just input, press A [. - 19 - A o SD 427. A a SD 22805. • } } inputs the same data twice (as above). ... A ` SD 53.375 A r SD 8. Sample standard deviation Population standard deviation Arithmetic mean Number of data Sum of values Sum of squares of the same data using -. Input Data.
To input the data 110 ten times, for example, press 110 -10 }. • The above . • To delete data you have just input, press A [. - 19 - A o SD 427. A a SD 22805. • } } inputs the same data twice (as above). ... A ` SD 53.375 A r SD 8. Sample standard deviation Population standard deviation Arithmetic mean Number of data Sum of values Sum of squares of the same data using -. Input Data.
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... 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. In the case of values A o kExponential Display Formats This calculator can select between two formats that determine at what point exponential notation is...
... 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. In the case of values A o kExponential Display Formats This calculator can select between two formats that determine at what point exponential notation is...
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There is no indication on the display of the examples in this manual show calculation results using the NORM 1 format. kMaking Corrections During Calculations • If you can press k to backspace and delete input digits one . kWhen you are not what you can determine the setting by -one -by performing the following steps. 1. Check the...
There is no indication on the display of the examples in this manual show calculation results using the NORM 1 format. kMaking Corrections During Calculations • If you can press k to backspace and delete input digits one . kWhen you are not what you can determine the setting by -one -by performing the following steps. 1. Check the...
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... on the display.) b. In this case, the operator of the last key you press is used . ("- 1-" indicator appears on the display.) • To clear any of the above conditions, press t and perform the calculation from the beginning. - 26 - When a result (whether intermediate or final) or a total... accumulated in memor y is greater than 18 pairs of parentheses are performed using a value that exceeds the input range. ("-E-" indicator appears on the display.) c. When function calculations are used , but the operation retains the order of precedence of the operation for the first key...
... on the display.) b. In this case, the operator of the last key you press is used . ("- 1-" indicator appears on the display.) • To clear any of the above conditions, press t and perform the calculation from the beginning. - 26 - When a result (whether intermediate or final) or a total... accumulated in memor y is greater than 18 pairs of parentheses are performed using a value that exceeds the input range. ("-E-" indicator appears on the display.) c. When function calculations are used , but the operation retains the order of precedence of the operation for the first key...
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...10Ҁ99)to an area with more light. • fx-85B/fx-280 This calculator is powered by pressing 5. - 27 - 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 the independent memory may be restored by the CASIO...• In the case of light 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...
...10Ҁ99)to an area with more light. • fx-85B/fx-280 This calculator is powered by pressing 5. - 27 - 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 the independent memory may be restored by the CASIO...• In the case of light 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...
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Always keep written records of how much the calculator is used. Remove the screws that comes with the calculator when you can see it is facing up (so you can see it in place, and then remove the cover. 2. Screws Battery Screws Remove the ...old battery. 3. It may leak, causing serious damage to become corrupted or lost completely. Replace the back cover and secure it ). 4. Incorrect use of...
Always keep written records of how much the calculator is used. Remove the screws that comes with the calculator when you can see it is facing up (so you can see it in place, and then remove the cover. 2. Screws Battery Screws Remove the ...old battery. 3. It may leak, causing serious damage to become corrupted or lost completely. Replace the back cover and secure it ). 4. Incorrect use of...
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...in the following order of parentheses are performed first. • Registers L through L store operations.There 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...on the next page shows register contents following the above input. - 29 - Press t to 18 times. • Example: The following operation uses 4 levels and 5 nested parentheses. 2-O OO3 +4 -OO5 +4 The table on . kOrder of Operations and Levels Operations are performed in the innermost set ...
...in the following order of parentheses are performed first. • Registers L through L store operations.There 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...on the next page shows register contents following the above input. - 29 - Press t to 18 times. • Example: The following operation uses 4 levels and 5 nested parentheses. 2-O OO3 +4 -OO5 +4 The table on . kOrder of Operations and Levels Operations are performed in the innermost set ...
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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°. Y Y P (x, y) P (r, θ ) Pol r y Rec θ 0 x X 0 X - 30 - 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.
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°. Y Y P (x, y) P (r, θ ) Pol r y Rec θ 0 x X 0 X - 30 - 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.