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...malfunction, repairs, or battery replacement (fx-85B/fx280), or insufficient light. It can leak and damage the unit. • Avoid using volatile liquids such as thinner or benzine to operate. Wipe it with a soft cloth, or with a cloth that all your calculator and otherwise subjecting it to strong ...impact. • Do not store the calculator or leave it apart. • Avoid ...
...malfunction, repairs, or battery replacement (fx-85B/fx280), or insufficient light. It can leak and damage the unit. • Avoid using volatile liquids such as thinner or benzine to operate. Wipe it with a soft cloth, or with a cloth that all your calculator and otherwise subjecting it to strong ...impact. • Do not store the calculator or leave it apart. • Avoid ...
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...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...
...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...
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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 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 - O 5+ 4PP = 122. • You can skip all P operations before the = key. - 5 -
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...; Press +, ,, - K 34. K 68. 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...
...; Press +, ,, - K 34. K 68. 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...
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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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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. • To clear a memory, store a zero in it. ...
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. • To clear a memory, store a zero in it. ...
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Fraction Calculations • Use COMP mode for fraction calculations. • Total number of 123 ҂ 456 in memory B. t 123 - 456 A J 2 56088. t 0 1 123. • Example 2: To store the results of digits (... 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 0 2 56088.
Fraction Calculations • Use COMP mode for fraction calculations. • Total number of 123 ҂ 456 in memory B. t 123 - 456 A J 2 56088. t 0 1 123. • Example 2: To store the results of digits (... 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 0 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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...°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. K 216. • Example 4: To discount 3500 by 25%. 3500 - 25 A v , 2625...
...°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. K 216. • Example 4: To discount 3500 by 25%. 3500 - 25 A v , 2625...
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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 - • 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.
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... 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 starts with A u. • Example: To calculate nҀ1, n, o, n, ⌺x, and ⌺x2... for the following data : 55, 54, 51, 55, 53, 53, 54, 52. Statistical Calculations (SD Mode) • Press F l to enter the SD Mode for statistical calculations using the numbers 1 through 7. 7 A m 4...
... 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 starts with A u. • Example: To calculate nҀ1, n, o, n, ⌺x, and ⌺x2... for the following data : 55, 54, 51, 55, 53, 53, 54, 52. Statistical Calculations (SD Mode) • Press F l to enter the SD Mode for statistical calculations using the numbers 1 through 7. 7 A m 4...
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....375 A r SD 8. Input Data. Sample standard deviation Population standard deviation Arithmetic mean Number of data Sum of values Sum of squares of the same data using -. To input the data 110 ten times, for example, press 110 -10 }. • The above results can be obtained in any order, and not necessarily...
....375 A r SD 8. Input Data. Sample standard deviation Population standard deviation Arithmetic mean Number of data Sum of values Sum of squares of the same data using -. To input the data 110 ten times, for example, press 110 -10 }. • The above results can be obtained in any order, and not necessarily...
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... 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 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...
... 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 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...
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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. F 9 (NORM mode) 4. kMaking Corrections During Calculations • If you make a mistake when inputting a value (but you can determine the setting by -one -by performing the following steps. 1. kWhen you expect or ...
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. kMaking Corrections During Calculations • If you make a mistake when inputting a value (but you can determine the setting by -one -by performing the following steps. 1. kWhen you expect or ...
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...indicator appears on display.) e. When an illegal mathematical operation (such as an attempt to clear only the last calculation performed. • To change the operator key w, As, etc.) 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 - In this case, the operator of the last key you just pressed, simply press the correct operator key. a. When function calculations are used , but the operation retains the order of precedence of...
...indicator appears on display.) e. When an illegal mathematical operation (such as an attempt to clear only the last calculation performed. • To change the operator key w, As, etc.) 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 - In this case, the operator of the last key you just pressed, simply press the correct operator key. a. When function calculations are used , but the operation retains the order of precedence of...
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...k. WAY POWER system, which makes it possible for the calculator 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)... with more light. • fx-85B/fx-280 This calculator is too low, the display may become dim, calculation functions may become impossible, or the contents of the independent memory may be restored by the CASIO TWO- Solar Cell Precautions • The solar cell requires at least 50 lux...
...k. WAY POWER system, which makes it possible for the calculator 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)... with more light. • fx-85B/fx-280 This calculator is too low, the display may become dim, calculation functions may become impossible, or the contents of the independent memory may be restored by the CASIO TWO- Solar Cell Precautions • The solar cell requires at least 50 lux...
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Incorrect use of batteries can see it in place, and then remove the cover. 2. To replace the battery 1. Remove the old battery. 3. Keep batteries away from direct flame and heat. • Keep batteries out of the reach of how much the calculator is for testing only. Remove the screws that ... that comes with the screws. - 28 - Always keep written records of all important data. • Always be sure to the interior of the calculator. • The battery that the positive (ѿ) side is facing up (so you can cause memory contents to replace the battery at least once ...
Incorrect use of batteries can see it in place, and then remove the cover. 2. To replace the battery 1. Remove the old battery. 3. Keep batteries away from direct flame and heat. • Keep batteries out of the reach of how much the calculator is for testing only. Remove the screws that ... that comes with the screws. - 28 - Always keep written records of all important data. • Always be sure to the interior of the calculator. • The battery that the positive (ѿ) side is facing up (so you can cause memory contents to replace the battery at least once ...
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... performed in parentheses per- Press t to turn power on the next page shows register contents following operation uses 4 levels and 5 nested parentheses. 2-O OO3 +4 -OO5 +4 The table on . Functions 2. If parentheses are six reg- 1 6 isters, so calculations up to six levels can be stored. • Each level can contain up to three open...
... performed in parentheses per- Press t to turn power on the next page shows register contents following operation uses 4 levels and 5 nested parentheses. 2-O OO3 +4 -OO5 +4 The table on . Functions 2. If parentheses are six reg- 1 6 isters, so calculations up to six levels can be stored. • Each level can contain up to three open...
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Coordinate Transformation • With polar coordinates, θ can be calculated within a range of -180° θ ͨ 180°. The calculation range is the same for radians and grads. 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.
Coordinate Transformation • With polar coordinates, θ can be calculated within a range of -180° θ ͨ 180°. The calculation range is the same for radians and grads. 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.