User Manual
Page 4
Correct operation will resume once the calculator is made up of dust. 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 components by burning them. • Before assuming ...correctly. • Never leave the dead battery (fx-85B/fx-280) in a solution of malfunction, repairs, or battery replacement (fx-85B/fx280), or insufficient light. Never try to take it in areas exposed to strong impact. • Do not store the calculator or leave it apart. • Avoid dropping...
Correct operation will resume once the calculator is made up of dust. 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 components by burning them. • Before assuming ...correctly. • Never leave the dead battery (fx-85B/fx-280) in a solution of malfunction, repairs, or battery replacement (fx-85B/fx280), or insufficient light. Never try to take it in areas exposed to strong impact. • Do not store the calculator or leave it apart. • Avoid dropping...
User Manual
Page 5
... 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 the manufacturer. • Keep this manual on hand for future reference. fully reread this manual and ensure that the problem is not due to low battery power (fx...
... 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 the manufacturer. • Keep this manual on hand for future reference. fully reread this manual and ensure that the problem is not due to low battery power (fx...
User Manual
Page 6
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
Page 7
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 - 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 -
User Manual
Page 8
... 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 -...(17ѿ17) 17 + + = (17ѿ17 ѿ17) = (17ѿ17 ѿ17ѿ17) = - 6 - K 34. K 68. 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 -...(17ѿ17) 17 + + = (17ѿ17 ѿ17) = (17ѿ17 ѿ17ѿ17) = - 6 - K 34. K 68. A x - 5 A N = 523.5987756 Constant Calculations • Press +, ,, -
User Manual
Page 9
....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...
User Manual
Page 10
MK 135. MK 234. 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 ...
MK 135. MK 234. 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 ...
User Manual
Page 11
...; Use COMP mode for fraction calculations. • Total number of 123 ҂ 456 in memory B. t 0 2 56088. t 123 - 456 A J 2 56088. t 0 1 123. • Example 2: To store the results of digits (including division ...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 -
...; Use COMP mode for fraction calculations. • Total number of 123 ҂ 456 in memory B. t 0 2 56088. t 123 - 456 A J 2 56088. t 0 1 123. • Example 2: To store the results of digits (including division ...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 -
User Manual
Page 12
• 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.
User Manual
Page 13
... 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. 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. K 276. K 216.
... 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. 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. K 276. K 216.
User Manual
Page 18
• Example 5: 8! 8 Af 40320. F 7 2 FIX 0.00 1.234 +1.234 = FIX 2.47 • Example 2: 1.234ѿ1.234, rounding input to two places (FIX 2). kFIX, SCI, NORM, RND, RAN#, ENG Calculations • Example 1: 1.234ѿ1.234, rounding result to two places. 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 clear FIX specification. F 7 2 1.234 A b + 1.234 A b = • Press F 9 to clear SCI specification. - 16 -
• Example 5: 8! 8 Af 40320. F 7 2 FIX 0.00 1.234 +1.234 = FIX 2.47 • Example 2: 1.234ѿ1.234, rounding input to two places (FIX 2). kFIX, SCI, NORM, RND, RAN#, ENG Calculations • Example 1: 1.234ѿ1.234, rounding result to two places. 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 clear FIX specification. F 7 2 1.234 A b + 1.234 A b = • Press F 9 to clear SCI specification. - 16 -
User Manual
Page 20
... Mode) • Press F l to enter the SD Mode for statistical calculations using the numbers 1 through 7. 7 A m 4 = 840. 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: 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 •...
... Mode) • Press F l to enter the SD Mode for statistical calculations using the numbers 1 through 7. 7 A m 4 = 840. 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: 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 •...
User Manual
Page 23
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;
User Manual
Page 26
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 ...
User Manual
Page 27
...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 currently in this manual show calculation results using the NORM 1 format. Enter the correct modes to clear the input ...entirely and start again. - 25 - To switch between NORM 1 and NORM 2 Press F 9. If calculation results are working with to backspace and delete input digits one-by performing the following steps. 1. There is no indication on the display of the...
...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 currently in this manual show calculation results using the NORM 1 format. Enter the correct modes to clear the input ...entirely and start again. - 25 - To switch between NORM 1 and NORM 2 Press F 9. If calculation results are working with to backspace and delete input digits one-by performing the following steps. 1. There is no indication on the display of the...
User Manual
Page 28
...҂ 1099. ("-E-" indicator appears on the display.) • To clear any of the above conditions, press t and perform the calculation from the beginning. - 26 - When an illogical operation (such as division by zero) is performed. ("-E-" indicator appears on the ... 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 display.) e. a. When function calculations are used , but the operation retains the order of ...
...҂ 1099. ("-E-" indicator appears on the display.) • To clear any of the above conditions, press t and perform the calculation from the beginning. - 26 - When an illogical operation (such as division by zero) is performed. ("-E-" indicator appears on the ... 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 display.) e. a. When function calculations are used , but the operation retains the order of ...
User Manual
Page 29
...kPower Supply • fx-82SOLAR/fx-260SOLAR This calculator is powered by a solar cell that point. • No error occurs when the result is indicated when memory contents spontaneously clear, or when the display darkens under poor light and cannot be lost. Solar Cell Precautions • The solar cell requires at least ...8226; 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 within the range of the independent memory may be restored by the CASIO TWO- If this happens, move to the overflow, so you ...
...kPower Supply • fx-82SOLAR/fx-260SOLAR This calculator is powered by a solar cell that point. • No error occurs when the result is indicated when memory contents spontaneously clear, or when the display darkens under poor light and cannot be lost. Solar Cell Precautions • The solar cell requires at least ...8226; 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 within the range of the independent memory may be restored by the CASIO TWO- If this happens, move to the overflow, so you ...
User Manual
Page 30
... up (so you purchase it ). • Never try to charge batteries, take them apart, or allow them to burst or leak, possibly damaging the calculator. • Be sure to become shorted. Replace the back cover and secure it in place, and then remove the cover. 2. Incorrect use of how... much the calculator is for testing only. To replace the battery 1. Important! Old batteries may not provide full service life. • Low bettery power can see it...
... up (so you purchase it ). • Never try to charge batteries, take them apart, or allow them to burst or leak, possibly damaging the calculator. • Be sure to become shorted. Replace the back cover and secure it in place, and then remove the cover. 2. Incorrect use of how... much the calculator is for testing only. To replace the battery 1. Important! Old batteries may not provide full service life. • Low bettery power can see it...
User Manual
Page 31
kOrder of Operations and Levels Operations 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 ...
kOrder of Operations and Levels Operations 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 ...
User Manual
Page 32
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. 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.