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...or insufficient light. Wipe it in the battery compartment. Never try to take it apart. • Avoid dropping your calculator and otherwise subjecting it to strong impact. • Do not store the calculator or leave it with a soft cloth, or with a cloth that all your key operations are being performed correctly....(fx-85B/fx-280) in areas exposed to high temperature or humidity, or large amounts of dust. When exposed to low temperatures, the calculator may require more time to display results and may even fail to clean the unit. The user should prepare physical records of data to protect...
...or insufficient light. Wipe it in the battery compartment. Never try to take it apart. • Avoid dropping your calculator and otherwise subjecting it to strong impact. • Do not store the calculator or leave it with a soft cloth, or with a cloth that all your key operations are being performed correctly....(fx-85B/fx-280) in areas exposed to high temperature or humidity, or large amounts of dust. When exposed to low temperatures, the calculator may require more time to display results and may even fail to clean the unit. The user should prepare physical records of data to protect...
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... 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 Number of display indicator indicates COMP Mode...
... 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 Number of display indicator indicates COMP Mode...
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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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... 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... (17ѿ17) 17 + + = (17ѿ17 ѿ17) = (17ѿ17 ѿ17ѿ17) = - 6 - A x - 5 A N = 523.5987756 Constant Calculations • Press +, ,, - K 51. K 68.
... 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... (17ѿ17) 17 + + = (17ѿ17 ѿ17) = (17ѿ17 ѿ17ѿ17) = - 6 - A x - 5 A N = 523.5987756 Constant Calculations • Press +, ,, - K 51. K 68.
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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 .... • To clear a memory, store a zero in it. • Example 1: To input 123 in memory A. t 123 A J 1 123. - 8 - MK 234. MK 135. M 13. • Example 3: To calculate the following using memory and a constant: (12҂3)ȕ(45҂3)ѿ(78҂3)҃135. (12҂3) (45҂3) (78҂3) (Memory recall) 3 - - 12...
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 .... • To clear a memory, store a zero in it. • Example 1: To input 123 in memory A. t 123 A J 1 123. - 8 - MK 234. MK 135. M 13. • Example 3: To calculate the following using memory and a constant: (12҂3)ȕ(45҂3)ѿ(78҂3)҃135. (12҂3) (45҂3) (78҂3) (Memory recall) 3 - - 12...
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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. t 123 - 456 A J 2 56088.
... 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. 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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... take a long time to complete. • Wait for result before starting next calculation. • =3.1415926536. K 276. 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. - 11 - • 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.
... take a long time to complete. • Wait for result before starting next calculation. • =3.1415926536. K 276. 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. - 11 - • 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.
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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. FIX 2.46 • Example 3: 1Ö 3 , displaying result with two significant digits (SCI 2). kFIX, SCI, NORM, RND, RAN#, ENG Calculations • Example 1: 1.234ѿ1.234, rounding result to clear SCI specification. - 16 - 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.
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. FIX 2.46 • Example 3: 1Ö 3 , displaying result with two significant digits (SCI 2). kFIX, SCI, NORM, RND, RAN#, ENG Calculations • Example 1: 1.234ѿ1.234, rounding result to clear SCI specification. - 16 - 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.
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... 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. θ A N RAD 1.047197551 kPermutation ...8226; 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...
... 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. θ A N RAD 1.047197551 kPermutation ...8226; 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...
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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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Larger values are automatically displayed using exponential notation. 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 ...
Larger values are automatically displayed using exponential notation. 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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...... To switch between NORM 1 and NORM 2 Press F 9. kWhen you are not what you can press k to perform the calculation and try again. kMaking Corrections During Calculations • If you make a mistake when inputting a value (but you expect or if an error occurs, perform the following...mode) 2. Enter the correct modes to clear the input entirely and start again. - 25 - If calculation results are working with to confirm it is currently in this manual show calculation results using the NORM 1 format. There is no indication on the display of the examples in effect,...
...... To switch between NORM 1 and NORM 2 Press F 9. kWhen you are not what you can press k to perform the calculation and try again. kMaking Corrections During Calculations • If you make a mistake when inputting a value (but you expect or if an error occurs, perform the following...mode) 2. Enter the correct modes to clear the input entirely and start again. - 25 - If calculation results are working with to confirm it is currently in this manual show calculation results using the NORM 1 format. There is no indication on the display of the examples in effect,...
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...("-E-" indicator appears on the display.) b. a. 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 just pressed, simply press the correct operator key. • In ...the order of precedence of the operation for the first key you press is performed during statistical calculations. ("-E-" indicator appears on the display.) d. When an illogical operation (such as division by zero) is displayed to calculate o and σn while n ҃ 0) is used . ("- 1-" indicator appears ...
...("-E-" indicator appears on the display.) b. a. 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 just pressed, simply press the correct operator key. • In ...the order of precedence of the operation for the first key you press is performed during statistical calculations. ("-E-" indicator appears on the display.) d. When an illogical operation (such as division by zero) is displayed to calculate o and σn while n ҃ 0) is used . ("- 1-" indicator appears ...
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...be lost. Solar Cell Precautions • The solar cell requires at least 50 lux of light 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. • Weak battery power is powered by the CASIO TWO- • In the case of condition e, you can continue with the calculation from that converts available light into electrical power. Instead, the display shows all zeros.
...be lost. Solar Cell Precautions • The solar cell requires at least 50 lux of light 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. • Weak battery power is powered by the CASIO TWO- • In the case of condition e, you can continue with the calculation from that converts available light into electrical power. Instead, the display shows all zeros.
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... its positive (ѿ) side facing up (so you purchase it ). 4. Remove the screws that hold the back cover in place with the calculator when you can cause memory contents to replace the battery at least once every three years, regardless of small children. Important! To replace the ...load the battery with your physician immediately. 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 used. Keep batteries away from direct flame and heat. • Keep batteries out...
... its positive (ѿ) side facing up (so you purchase it ). 4. Remove the screws that hold the back cover in place with the calculator when you can cause memory contents to replace the battery at least once every three years, regardless of small children. Important! To replace the ...load the battery with your physician immediately. 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 used. Keep batteries away from direct flame and heat. • Keep batteries out...
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... nested, the operations en- 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 18...
... nested, the operations en- 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 18...
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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 - 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.
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 - 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.