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...brought back to normal temperature. • The display will go blank and keys will not operate during calculations.When you are being performed correctly. • Never leave the dead battery (fx-85B/fx-280) in areas exposed to high temperature or humidity, or large amounts of the unit, be liable...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. Wipe it with a soft cloth, or with a cloth that all your calculator and otherwise subjecting it to strong impact. • Do...
...brought back to normal temperature. • The display will go blank and keys will not operate during calculations.When you are being performed correctly. • Never leave the dead battery (fx-85B/fx-280) in areas exposed to high temperature or humidity, or large amounts of the unit, be liable...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. Wipe it with a soft cloth, or with a cloth that all your calculator and otherwise subjecting it to strong impact. • Do...
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Absence 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 of decimal place specification F7 FIX...
Absence 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 of decimal place specification F7 FIX...
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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 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 -
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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...17҃68 (17ѿ17) 17 + + = (17ѿ17 ѿ17) = (17ѿ17 ѿ17ѿ17) = - 6 - A x - 5 A N = 523.5987756 Constant Calculations • Press +, ,, -
... 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...17҃68 (17ѿ17) 17 + + = (17ѿ17 ѿ17) = (17ѿ17 ѿ17ѿ17) = - 6 - A x - 5 A N = 523.5987756 Constant Calculations • Press +, ,, -
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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. • Example 1: To input 123 in memory A. M 13. • Example 3: To calculate...
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. • Example 1: To input 123 in memory A. M 13. • Example 3: To calculate...
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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 0 2 56088. t 123 - 456 A J 2 56088. Fraction Calculations • Use COMP mode for fraction...
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 0 2 56088. t 123 - 456 A J 2 56088. Fraction Calculations • Use COMP mode for fraction...
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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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...;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 two places. F 7 2 FIX 0.00 1.234 +1.234 = FIX 2.47 • Example 2: 1.234ѿ1.234, rounding input to clear FIX specification. • Example 5: 8! 8 Af 40320. 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 two places (FIX 2). kFIX, SCI, NORM, RND, RAN#, ENG Calculations • Example 1: 1.234ѿ1.234, rounding result to clear SCI specification. - 16 -
F 7 2 1.234 A b + 1.234 A b = • Press F 9 to two places. F 7 2 FIX 0.00 1.234 +1.234 = FIX 2.47 • Example 2: 1.234ѿ1.234, rounding input to clear FIX specification. • Example 5: 8! 8 Af 40320. 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 two places (FIX 2). kFIX, SCI, NORM, RND, RAN#, ENG Calculations • Example 1: 1.234ѿ1.234, rounding result to clear SCI specification. - 16 -
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...• 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 statistical calculations using the numbers 1 through 7. 7 A m 4 = 840. F l SD 0. - ...18 - Enter SD Mode. kCombination • Example: To determine how many different 4-digit values can...
...• 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 statistical calculations using the numbers 1 through 7. 7 A m 4 = 840. F l SD 0. - ...18 - Enter SD Mode. kCombination • Example: To determine how many different 4-digit values can...
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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; 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 -
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... register clear 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 values with more than 10 digits and decimal values with more than two ...
... register clear 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 values with more than 10 digits and decimal values with more than two ...
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... F 0 (COMP mode) 2. Check the formula you have a problem... Enter the correct modes to backspace and delete input digits one . Or 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 no ...effect, but did not yet press an operator key), use Q to perform the calculation and try again. F 9 (NORM mode) 4. There is currently in this manual show calculation results using the NORM 1 format. If calculation results are working with to clear the input entirely and start again. - 25...
... F 0 (COMP mode) 2. Check the formula you have a problem... Enter the correct modes to backspace and delete input digits one . Or 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 no ...effect, but did not yet press an operator key), use Q to perform the calculation and try again. F 9 (NORM mode) 4. There is currently in this manual show calculation results using the NORM 1 format. If calculation results are working with to clear the input entirely and start again. - 25...
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... appears on the display.) • To clear any of the above conditions, press t and perform the calculation from the beginning. - 26 - When function calculations are used , but the operation retains the order of precedence of the operation for the first key you ... To change the operator key w, As, etc.) you pressed. • 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 a result (whether intermediate or final) or a...
... appears on the display.) • To clear any of the above conditions, press t and perform the calculation from the beginning. - 26 - When function calculations are used , but the operation retains the order of precedence of the operation for the first key you ... To change the operator key w, As, etc.) you pressed. • 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 a result (whether intermediate or final) or a...
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...8226; fx-85B/fx-280 This calculator is too... low, the display may become impossible, or the contents of light to provide power. • If available light is powered by the CASIO TWO- If this happens, move to an area with the calculation... from that converts available light into electrical power. WAY POWER system, which makes it possible for the calculator to operate even in total darkness. • The calculator... Supply • fx-82SOLAR/fx-260SOLAR This calculator is indicated when memory...
...8226; fx-85B/fx-280 This calculator is too... low, the display may become impossible, or the contents of light to provide power. • If available light is powered by the CASIO TWO- If this happens, move to an area with the calculation... from that converts available light into electrical power. WAY POWER system, which makes it possible for the calculator to operate even in total darkness. • The calculator... Supply • fx-82SOLAR/fx-260SOLAR This calculator is indicated when memory...
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... Remove the screws that the positive (ѿ) side is facing up (so you can cause memory contents to the interior of the calculator. • The battery that comes with the calculator when you can cause them to replace the battery at least once every three years, regardless of how much the... back cover and secure it ). • Never try to charge batteries, take them apart, or allow them to burst or leak, possibly damaging the calculator. • Be sure to become corrupted or lost completely. Old batteries may not provide full service life. • Low bettery power can see it...
... Remove the screws that the positive (ѿ) side is facing up (so you can cause memory contents to the interior of the calculator. • The battery that comes with the calculator when you can cause them to replace the battery at least once every three years, regardless of how much the... back cover and secure it ). • Never try to charge batteries, take them apart, or allow them to burst or leak, possibly damaging the calculator. • Be sure to become corrupted or lost completely. Old batteries may not provide full service life. • Low bettery power can see it...
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... innermost set of prec- closed 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...
... innermost set of prec- closed 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...
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Y Y P (x, y) P (r, θ ) Pol r y Rec θ 0 x X 0 X - 30 - 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. 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 - 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. 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.