User Manual
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... arising out of precision components. Correct operation will resume once the calculator is made up of malfunction, repairs, or battery replacement (fx-85B/fx280), or insufficient light. When exposed to low temperatures, the calculator may require more time to display results and may even fail to...dipped in areas exposed to you 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 the manufacturer...
... arising out of precision components. Correct operation will resume once the calculator is made up of malfunction, repairs, or battery replacement (fx-85B/fx280), or insufficient light. When exposed to low temperatures, the calculator may require more time to display results and may even fail to...dipped in areas exposed to you 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 the manufacturer...
User Manual
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... 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 - Absence of significant digit specification F8 ...SCI Cancels FIX and SCI settings F9 NORM * Display indicators show current mode setting. fully reread this manual and ensure that the problem is not due to low battery power (fx-85B/fx-280) or operational error....
... 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 - Absence of significant digit specification F8 ...SCI Cancels FIX and SCI settings F9 NORM * Display indicators show current mode setting. fully reread this manual and ensure that the problem is not due to low battery power (fx-85B/fx-280) or operational error....
User Manual
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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 -
User Manual
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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 - 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 -
User Manual
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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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• 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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t 123 A J 1 123. - 8 - 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 ...
t 123 A J 1 123. - 8 - 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 ...
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...; 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 - Fraction Calculations • Use COMP mode for fraction calculations. • Total number of 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 - Fraction Calculations • Use COMP mode for fraction calculations. • Total number of 123...
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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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... 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 calculation. • ...9266; =3.1415926536. 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...
... 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 calculation. • ...9266; =3.1415926536. 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...
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F 7 2 FIX 0.00 1.234 +1.234 = FIX 2.47 • Example 2: 1.234ѿ1.234, rounding input to clear FIX specification. F 7 2 1.234 A b + 1.234 A b = • Press F 9 to two places. F 8 2 SCI 0.0 00 1 \3 = SCI 3.3-01 • Press F 9 to two places (FIX 2). • Example 5: 8! 8 Af 40320. kFIX, SCI, NORM, RND, RAN#, ENG Calculations • Example 1: 1.234ѿ1.234, rounding result to clear SCI specification. - 16 - 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 FIX specification. F 7 2 1.234 A b + 1.234 A b = • Press F 9 to two places. F 8 2 SCI 0.0 00 1 \3 = SCI 3.3-01 • Press F 9 to two places (FIX 2). • Example 5: 8! 8 Af 40320. kFIX, SCI, NORM, RND, RAN#, ENG Calculations • Example 1: 1.234ѿ1.234, rounding result to clear SCI specification. - 16 - FIX 2.46 • Example 3: 1Ö 3 , displaying result with two significant digits (SCI 2).
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...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. F l SD 0. - 18 - 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. θ A ...
...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. F l SD 0. - 18 - 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. θ A ...
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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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... 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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...is correct. 5. Enter the correct modes to confirm it is currently in this manual show calculation results using the NORM 1 format. F 9 (NORM mode) 4. If calculation results are working with to perform the calculation and try again. Check the formula you are not what you can press k to ...backspace and delete input digits one . Or you have a problem... There is no indication on the display of...
...is correct. 5. Enter the correct modes to confirm it is currently in this manual show calculation results using the NORM 1 format. F 9 (NORM mode) 4. If calculation results are working with to perform the calculation and try again. Check the formula you are not what you can press k to ...backspace and delete input digits one . Or you have a problem... There is no indication on the display of...
User Manual
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...whether intermediate or final) or a total accumulated in memor y is performed during statistical calculations. ("-E-" indicator appears on the display.) b. The total number of the above conditions, press t and perform the calculation from the beginning. - 26 - In this case, the operator of parentheses are...indicator appears on display.) e. kOverflow or Error Check The following conditions make further calculation impossible. 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 ...
...whether intermediate or final) or a total accumulated in memor y is performed during statistical calculations. ("-E-" indicator appears on the display.) b. The total number of the above conditions, press t and perform the calculation from the beginning. - 26 - In this case, the operator of parentheses are...indicator appears on display.) e. kOverflow or Error Check The following conditions make further calculation impossible. 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 ...
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...overflow, so you could also press k. WAY POWER system, which makes it possible for the calculator to Ҁ(1҂10Ҁ99). kPower Supply • fx-82SOLAR/fx-260SOLAR This calculator is indicated when memory contents spontaneously clear, or when the display darkens under poor light and ...area with the calculation from that converts available light into electrical power. • In the case of the independent memory may become impossible, or the contents of condition e, you can continue with more light. • fx-85B/fx-280 This calculator is powered by the CASIO TWO-
...overflow, so you could also press k. WAY POWER system, which makes it possible for the calculator to Ҁ(1҂10Ҁ99). kPower Supply • fx-82SOLAR/fx-260SOLAR This calculator is indicated when memory contents spontaneously clear, or when the display darkens under poor light and ...area with the calculation from that converts available light into electrical power. • In the case of the independent memory may become impossible, or the contents of condition e, you can continue with more light. • fx-85B/fx-280 This calculator is powered by the CASIO TWO-
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...then remove the cover. 2. Always keep written records of all important data. • Always be sure to load the battery with the calculator when you can cause them to become shorted. Remove the old battery. 3. Screws Battery Screws Important! It may leak, causing serious damage ...to replace the battery at least once every three years, regardless of the calculator. • The battery that hold the back cover in place with your physician immediately. Remove the screws that comes with its positive (...
...then remove the cover. 2. Always keep written records of all important data. • Always be sure to load the battery with the calculator when you can cause them to become shorted. Remove the old battery. 3. Screws Battery Screws Important! It may leak, causing serious damage ...to replace the battery at least once every three years, regardless of the calculator. • The battery that hold the back cover in place with your physician immediately. Remove the screws that comes with its positive (...
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xy, x1/y, R →P, P →R, nPr, nCr 3. ҂, Ȗ 4. ѿ, Ҁ • Operations 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 turn ...
xy, x1/y, R →P, P →R, nPr, nCr 3. ҂, Ȗ 4. ѿ, Ҁ • Operations 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 turn ...
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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.