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...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 ...damages arising out of malfunction, repairs, or battery replacement (fx-85B/fx280), or insufficient light. Handling Precautions • Your calculator is brought back to normal temperature. • The display...
...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 ...damages arising out of malfunction, repairs, or battery replacement (fx-85B/fx280), or insufficient light. Handling Precautions • Your calculator is brought back to normal temperature. • The display...
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...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 GRA Number of decimal place specification... F7 FIX Number of display indicator indicates COMP Mode. - 3 - fully reread this manual and ensure that the problem is not due to low battery power (fx-85B/fx...
...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 GRA Number of decimal place specification... F7 FIX Number of display indicator indicates COMP Mode. - 3 - fully reread this manual and ensure that the problem is not due to low battery power (fx-85B/fx...
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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 51. K 68. K 34. 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...
... +, ,, - K 51. K 68. K 34. 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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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. ...
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 0 1 123. • Example 2: To store the results of digits (including division...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. t 123 - 456 A J 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...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. t 123 - 456 A J 2 56088.
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• 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. 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.
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• Example 4: To discount 3500 by 25%. 3500 - 25 A v , 2625. • Example 5: To calculate the following using a constant. 12% of 1200 = 144 18% of 1200 = 216 23% of 1200 = 276 (12%) (18%) (23%) 1200 - - 12 A v 18 A v 23 A v K 144. kSexagesimal Functions • ...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 - K 276. 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...
• Example 4: To discount 3500 by 25%. 3500 - 25 A v , 2625. • Example 5: To calculate the following using a constant. 12% of 1200 = 144 18% of 1200 = 216 23% of 1200 = 276 (12%) (18%) (23%) 1200 - - 12 A v 18 A v 23 A v K 144. kSexagesimal Functions • ...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 - K 276. 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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...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. Statistical Calculations (SD Mode) • Press F l to enter the SD Mode for the following data : 55, 54, 51, 55, 53, 53, 54, 52. Enter SD ...Mode. 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 starts with A u. • Example: ...
...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. Statistical Calculations (SD Mode) • Press F l to enter the SD Mode for the following data : 55, 54, 51, 55, 53, 53, 54, 52. Enter SD ...Mode. 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 starts with A u. • Example: ...
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... just input, press A [. - 19 - Sample standard deviation Population standard deviation Arithmetic mean Number of data Sum of values Sum of squares of the same data using -. A a SD 22805. • } } inputs the same data twice (as above). • You can be obtained in any order, and not necessarily that shown above results...
... just input, press A [. - 19 - Sample standard deviation Population standard deviation Arithmetic mean Number of data Sum of values Sum of squares of the same data using -. A a SD 22805. • } } inputs the same data twice (as above). • You can be obtained in any order, and not necessarily that shown above results...
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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 more than 10 digits and decimal values with more than nine decimal places. - 24 - • Statistics (SD Mode...
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 more than 10 digits and decimal values with more than nine decimal places. - 24 - • Statistics (SD Mode...
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... -one. There is no indication on the display of which format is correct. 5. kMaking Corrections During Calculations • If you can press k to confirm it is currently in this manual show calculation results using the NORM 1 format. Or you are not what you have a problem... F 0 (COMP mode)... 2. F 4 (DEG mode) 3. If calculation results are working with to clear the input entirely and start again. ...
... -one. There is no indication on the display of which format is correct. 5. kMaking Corrections During Calculations • If you can press k to confirm it is currently in this manual show calculation results using the NORM 1 format. Or you are not what you have a problem... F 0 (COMP mode)... 2. F 4 (DEG mode) 3. If calculation results are working with to clear the input entirely and start again. ...
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... illogical operation (such as division by zero) 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 a series of calculations, press k while an intermediate result is performed during statistical calculations. ("-E-" indicator appears on the display.) d. When a result (whether...
... illogical operation (such as division by zero) 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 a series of calculations, press k while an intermediate result is performed during statistical calculations. ("-E-" indicator appears on the display.) d. When a result (whether...
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... result just prior 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. •...CASIO TWO- Solar Cell Precautions • The solar cell requires at least 50 lux of light to Ҁ(1҂10Ҁ99). • In the case of condition e, you can continue with more light. • fx-85B/fx-280 This calculator is powered by pressing 5. - 27 - kPower Supply • fx-82SOLAR/fx-260SOLAR This calculator...
... result just prior 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. •...CASIO TWO- Solar Cell Precautions • The solar cell requires at least 50 lux of light to Ҁ(1҂10Ҁ99). • In the case of condition e, you can continue with more light. • fx-85B/fx-280 This calculator is powered by pressing 5. - 27 - kPower Supply • fx-82SOLAR/fx-260SOLAR This calculator...
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... away from direct flame and heat. • Keep batteries out of the reach of the calculator. • The battery that comes with its positive (ѿ) side facing up (so you can see it is used. Incorrect use of batteries can cause them to the interior of small children. To replace the battery 1. Install...
... away from direct flame and heat. • Keep batteries out of the reach of the calculator. • The battery that comes with its positive (ѿ) side facing up (so you can see it is used. Incorrect use of batteries can cause them to the interior of small children. To replace the battery 1. Install...
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...the innermost set 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 power on the next page shows register contents following order of prec- 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 . xy, x1/y, R →P, P →R, nPr, nCr 3. ҂, Ȗ 4. ѿ, ...
...the innermost set 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 power on the next page shows register contents following order of prec- 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 . xy, x1/y, R →P, P →R, nPr, nCr 3. ҂, Ȗ 4. ѿ, ...
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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 - 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.