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... exposed to high temperature or humidity, or large amounts of malfunction, repairs, or battery replacement (fx-85B/fx280), or insufficient light. It can leak and damage the unit. • Avoid using volatile liquids such as thinner or benzine to operate. Correct operation will the manufacturer and its suppliers... neutral detergent and wring out. • In no event will resume once the calculator is made up of the unit, be sure to protect against such data loss. • Never dispose of battery (fx-85B/fx-280), the liquid crystal panel, or other damages arising out of dust. The user...
... exposed to high temperature or humidity, or large amounts of malfunction, repairs, or battery replacement (fx-85B/fx280), or insufficient light. It can leak and damage the unit. • Avoid using volatile liquids such as thinner or benzine to operate. Correct operation will the manufacturer and its suppliers... neutral detergent and wring out. • In no event will resume once the calculator is made up of the unit, be sure to protect against such data loss. • Never dispose of battery (fx-85B/fx-280), the liquid crystal panel, or other damages arising out of dust. The user...
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fully reread this manual and ensure that the problem is not due to low battery power (fx-85B/fx-280) or operational error. • The contents of this manual are subject to change without the express written consent of ...part of this manual on hand for future reference. 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 significant digit specification F8...
fully reread this manual and ensure that the problem is not due to low battery power (fx-85B/fx-280) or operational error. • The contents of this manual are subject to change without the express written consent of ...part of this manual on hand for future reference. 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 significant digit specification F8...
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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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... 7: 4/3π53 4 \ 3 - K 68. or \ twice 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...
... 7: 4/3π53 4 \ 3 - K 68. or \ twice 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...
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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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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...in it. • Example 1: To input 123 in memory A. t 123 A J 1 123. - 8 - MK 234. MK 135. 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 = A Y 45 A ...
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...in it. • Example 1: To input 123 in memory A. t 123 A J 1 123. - 8 - MK 234. MK 135. 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 = A Y 45 A ...
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t 123 - 456 A J 2 56088. Fraction Calculations • Use COMP mode for fraction calculations. • Total number of 123 ҂ 456 in memory B. t 0 2 56088. t 0 1 123. • Example 2: To store the results of digits (including ... 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 123 - 456 A J 2 56088. Fraction Calculations • Use COMP mode for fraction calculations. • Total number of 123 ҂ 456 in memory B. t 0 2 56088. t 0 1 123. • Example 2: To store the results of digits (including ... 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 -
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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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... 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. Scientific Function Calculations • Use COMP mode for scientific function calculations. • Some calculations may take a long time to complete. • Wait for result...
... 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. Scientific Function Calculations • Use COMP mode for scientific function calculations. • Some calculations may take a long time to complete. • Wait for result...
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kTrigonometric/Inverse Trigonometric Functions • Example 1: sin ( 6 rad) (RAD mode) A x \ 6 = S RAD 0.5 - 12 - • Example 2: 1°2'3" + 4.56 = 5.594166667 1 I 2 I 3 I + 4.56 = 5.594166667 • Example 3: sin 87°65'43.21" = 0.999447513 (DEG mode) 87 I 65 I 43.21 I S 0.999447513 • Example 4: 1.23↔ 1°13'48" 1.23 I I I 1°13°48. 1.23 1°13°48. • Example 5: 12°34' ↔ 12.56666667 12 I 34 I A O 12.56666667 You can also use I when inputting values to convert between sexagesimal and decimal.
kTrigonometric/Inverse Trigonometric Functions • Example 1: sin ( 6 rad) (RAD mode) A x \ 6 = S RAD 0.5 - 12 - • Example 2: 1°2'3" + 4.56 = 5.594166667 1 I 2 I 3 I + 4.56 = 5.594166667 • Example 3: sin 87°65'43.21" = 0.999447513 (DEG mode) 87 I 65 I 43.21 I S 0.999447513 • Example 4: 1.23↔ 1°13'48" 1.23 I I I 1°13°48. 1.23 1°13°48. • Example 5: 12°34' ↔ 12.56666667 12 I 34 I A O 12.56666667 You can also use I when inputting values to convert between sexagesimal and decimal.
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... 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 statistical calculations using the numbers 1 through 7. 7 A m 4 = 840. Statistical Calculations (SD Mode) • Press F l to enter the SD Mode for the following data : 55, 54, 51, 55, 53...
... 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 statistical calculations using the numbers 1 through 7. 7 A m 4 = 840. Statistical Calculations (SD Mode) • Press F l to enter the SD Mode for the following data : 55, 54, 51, 55, 53...
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Sample standard deviation Population standard deviation Arithmetic mean Number of data Sum of values Sum of squares of the same data using -. A a SD 22805. • } } inputs the same data twice (as above . • To delete data you have just input, press A [. - 19 - A o SD 427. A q SD 1.407885953 A p SD 1....
Sample standard deviation Population standard deviation Arithmetic mean Number of data Sum of values Sum of squares of the same data using -. A a SD 22805. • } } inputs the same data twice (as above . • To delete data you have just input, press A [. - 19 - A o SD 427. A q SD 1.407885953 A p SD 1....
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... 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...
... 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 4 (DEG mode) 3. Check the formula 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 the examples in this manual show calculation results using the NORM 1 format. F 0 (COMP mode) 2. F 9 (NORM mode) 4. Enter the correct... when inputting a value (but did not yet press an operator key), use Q to backspace and delete input digits one . kMaking Corrections During Calculations • If you can press k to perform the calculation and try again. kWhen you can determine the setting by -one -by...
...F 4 (DEG mode) 3. Check the formula 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 the examples in this manual show calculation results using the NORM 1 format. F 0 (COMP mode) 2. F 9 (NORM mode) 4. Enter the correct... when inputting a value (but did not yet press an operator key), use Q to backspace and delete input digits one . kMaking Corrections During Calculations • If you can press k to perform the calculation and try again. kWhen you can determine the setting by -one -by...
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... display.) e. When an illogical operation (such as division by zero) is displayed to calculate o and σn while n ҃ 0) is greater than 18 pairs of parentheses are performed using a value that exceeds the input range. ("-E-" indicator appears on the display.) c. When... a result (whether intermediate or final) or a total accumulated in memor y is performed during statistical calculations. ("-E-" indicator appears on the display.) ...
... display.) e. When an illogical operation (such as division by zero) is displayed to calculate o and σn while n ҃ 0) is greater than 18 pairs of parentheses are performed using a value that exceeds the input range. ("-E-" indicator appears on the display.) c. When... a result (whether intermediate or final) or a total accumulated in memor y is performed during statistical calculations. ("-E-" indicator appears on the display.) ...
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... lost. • In the case of condition e, you can continue with more light. • fx-85B/fx-280 This calculator is powered by the CASIO TWO- If this happens, move to an area with the calculation from that point. • No error occurs when the result is within the range of ѿ...;(1҂10Ҁ99)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...
... lost. • In the case of condition e, you can continue with more light. • fx-85B/fx-280 This calculator is powered by the CASIO TWO- If this happens, move to an area with the calculation from that point. • No error occurs when the result is within the range of ѿ...;(1҂10Ҁ99)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...
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... • Keep batteries out of the reach of batteries can cause memory contents to load the battery with the calculator when you can see it ). • Never try to charge batteries, take them apart, or allow them to...It may leak, causing serious damage to become corrupted or lost completely. Always keep written records of the calculator. • The battery that hold the back cover in place with your physician immediately. Remove the screws...swallowed, consult with the screws. - 28 - Replace the back cover and secure it is used. Important! Remove the old battery. 3. Incorrect...
... • Keep batteries out of the reach of batteries can cause memory contents to load the battery with the calculator when you can see it ). • Never try to charge batteries, take them apart, or allow them to...It may leak, causing serious damage to become corrupted or lost completely. Always keep written records of the calculator. • The battery that hold the back cover in place with your physician immediately. Remove the screws...swallowed, consult with the screws. - 28 - Replace the back cover and secure it is used. Important! Remove the old battery. 3. Incorrect...
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... from left to turn power on the next page shows register contents following operation uses 4 levels and 5 nested parentheses. 2-O OO3 +4 -OO5 +4 The table on . 5. edence. 1. 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...
... from left to turn power on the next page shows register contents following operation uses 4 levels and 5 nested parentheses. 2-O OO3 +4 -OO5 +4 The table on . 5. edence. 1. 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...
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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. Y Y P (x, y) P (r, θ ) Pol r y Rec θ 0 x X 0 X - 30 - 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°. 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 - 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.