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...liquids such as thinner or benzine to operate. Correct operation will resume once the calculator is made up of malfunction, repairs, or battery replacement (fx-85B/fx280), or insufficient light. Handling Precautions • Your calculator is brought back to normal temperature. • The display will go blank ... of the unit, be sure to watch the display to make sure that all your calculator and otherwise subjecting it to you are being performed correctly. • Never leave the dead battery (fx-85B/fx-280) in a solution of dust. The user should prepare physical records of data to...
...liquids such as thinner or benzine to operate. Correct operation will resume once the calculator is made up of malfunction, repairs, or battery replacement (fx-85B/fx280), or insufficient light. Handling Precautions • Your calculator is brought back to normal temperature. • The display will go blank ... of the unit, be sure to watch the display to make sure that all your calculator and otherwise subjecting it to you are being performed correctly. • Never leave the dead battery (fx-85B/fx-280) in a solution of dust. The user should prepare physical records of data to...
User Manual
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...fx-85B/fx-280) or operational error. • The contents of this manual are subject to change without the 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 GRA Number...
...fx-85B/fx-280) or operational error. • The contents of this manual are subject to change without the 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 GRA Number...
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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 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 - 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 -
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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 E = K 27.6 K -108. • Example...
... 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...
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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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...;3)ȕ(45҂3)ѿ(78҂3)҃135. (12҂3) (45҂3) (78҂3) (Memory recall) 3 - - 12 = A Y 45 A { 78 | Z MK 36. 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...
...;3)ȕ(45҂3)ѿ(78҂3)҃135. (12҂3) (45҂3) (78҂3) (Memory recall) 3 - - 12 = A Y 45 A { 78 | Z MK 36. 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...
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... 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 0 2 56088. Fraction Calculations • Use COMP mode for fraction calculations. • Total number of 123 ҂ 456 in memory B.
... 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 0 2 56088. Fraction Calculations • Use COMP mode for fraction calculations. • Total number of 123 ҂ 456 in memory B.
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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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• 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. K 216. ...; 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...
• 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. K 216. ...; 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 5: 8! 8 Af 40320. kFIX, SCI, NORM, RND, RAN#, ENG Calculations • Example 1: 1.234ѿ1.234, rounding result to clear FIX specification. F 7 2 1.234 A b + 1.234 A b = • Press F 9 to two places (FIX 2). FIX 2.46 • Example 3: 1Ö 3 , displaying result with two significant digits (SCI 2). F 7 2 FIX 0.00 1.234 +1.234 = FIX 2.47 • Example 2: 1.234ѿ1.234, rounding input to clear SCI specification. - 16 - F 8 2 SCI 0.0 00 1 \3 = SCI 3.3-01 • Press F 9 to two places.
• Example 5: 8! 8 Af 40320. kFIX, SCI, NORM, RND, RAN#, ENG Calculations • Example 1: 1.234ѿ1.234, rounding result to clear FIX specification. F 7 2 1.234 A b + 1.234 A b = • Press F 9 to two places (FIX 2). FIX 2.46 • Example 3: 1Ö 3 , displaying result with two significant digits (SCI 2). F 7 2 FIX 0.00 1.234 +1.234 = FIX 2.47 • Example 2: 1.234ѿ1.234, rounding input to clear SCI specification. - 16 - F 8 2 SCI 0.0 00 1 \3 = SCI 3.3-01 • Press F 9 to two places.
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... 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 = 840. Enter SD Mode. F l SD 0. - 18 - θ A N RAD 1.047197551 kPermutation...
... 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 = 840. Enter SD Mode. F l SD 0. - 18 - θ A N RAD 1.047197551 kPermutation...
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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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... A u Sum of squares of values A a Sum of decimal value, you can display up to 10 digits. 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...
... A u Sum of squares of values A a Sum of decimal value, you can display up to 10 digits. 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...
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...; If you make a mistake when inputting a value (but you expect or if an error occurs, perform the following calculation. 1 \ 200 = 5. -03 NORM 1 format 0.005 NORM 2 format • All of which format is correct. 5. F 9 (NORM mode) 4. Enter the correct modes to clear the ...input entirely and start again. - 25 - F 0 (COMP mode) 2. Check the formula you are not what you can press k to perform the calculation and try again. To switch between NORM 1 and NORM 2 Press F 9. kWhen you can determine the setting by -one. There is no indication on the display...
...; If you make a mistake when inputting a value (but you expect or if an error occurs, perform the following calculation. 1 \ 200 = 5. -03 NORM 1 format 0.005 NORM 2 format • All of which format is correct. 5. F 9 (NORM mode) 4. Enter the correct modes to clear the ...input entirely and start again. - 25 - F 0 (COMP mode) 2. Check the formula you are not what you can press k to perform the calculation and try again. To switch between NORM 1 and NORM 2 Press F 9. kWhen you can determine the setting by -one. There is no indication on the display...
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...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 - When a result (whether intermediate or final) or a total accumulated in memor y is performed during statistical...more than ±9.999999999 ҂ 1099. ("-E-" indicator appears on the display.) b. kOverflow or Error Check The following conditions make further calculation impossible. • In a series of parentheses are performed using a value that exceeds the input range. ("-E-" indicator appears on the display.) c.
...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 - When a result (whether intermediate or final) or a total accumulated in memor y is performed during statistical...more than ±9.999999999 ҂ 1099. ("-E-" indicator appears on the display.) b. kOverflow or Error Check The following conditions make further calculation impossible. • In a series of parentheses are performed using a value that exceeds the input range. ("-E-" indicator appears on the display.) c.
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..., move to provide power. • If available light is powered by the CASIO TWO- Solar Cell Precautions • The solar cell requires at least 50 lux of light to an area with the calculation from that converts available light into electrical power. WAY POWER system, which makes it... display shows all zeros. • In the case of condition e, you can 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 contents of the independent memory may be restored by pressing 5. - 27 -
..., move to provide power. • If available light is powered by the CASIO TWO- Solar Cell Precautions • The solar cell requires at least 50 lux of light to an area with the calculation from that converts available light into electrical power. WAY POWER system, which makes it... display shows all zeros. • In the case of condition e, you can 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 contents of the independent memory may be restored by pressing 5. - 27 -
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...(so you can see it ). • Never try to charge batteries, take them apart, or allow them to burst or leak, possibly damaging the calculator. • Be sure to replace the battery at least once every three years, regardless of batteries can cause memory contents to the interior of the... calculator. • The battery that comes with your physician immediately. To replace the battery 1. Replace the back cover and secure it is for testing only. ...
...(so you can see it ). • Never try to charge batteries, take them apart, or allow them to burst or leak, possibly damaging the calculator. • Be sure to replace the battery at least once every three years, regardless of batteries can cause memory contents to the interior of the... calculator. • The battery that comes with your physician immediately. To replace the battery 1. Replace the back cover and secure it is for testing only. ...
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..., the operations en- formed first. Functions 2. closed in the innermost set of prec- Press t 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 18...
..., the operations en- formed first. Functions 2. closed in the innermost set of prec- Press t 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 18...
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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.