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Using Casio fx-82AU
Math Calculations
Introduction:
This sheet will teach you how to use the Casio fx-82AU calculator to perform basic mathematical operations.
Some of the keys that are available for basic calculations on your calculator are explained here. See also
our handout for statistical functions. Any further queries please contact Student Central.
This sheet will teach you to:
Use normal calculator mode
Recognise basic keys you need to be familiar with
Calculate using trig keys
Put information into memory
Perform basic calculations
1. Location of keys
(fraction key)
(square root key)
(-) (negative key)
fx-82AU, shown with the location of some keys mentioned in the text
Page 1 of 11
Learning Skills
MODE SETUP
(power key)
x
2
(squaring key)
x
(fraction to
S
D
decimal key)
x
10
(exponent key)
Learning Skills @ CSU
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Summary of Contents for Casio fx-82AU
- Page 1 Learning Skills Introduction: This sheet will teach you how to use the Casio fx-82AU calculator to perform basic mathematical operations. Some of the keys that are available for basic calculations on your calculator are explained here. See also our handout for statistical functions. Any further queries please contact Student Central.
- Page 2 2. Calculator Modes Your calculator can be put into several different modes. Each mode has its own purpose. The 82AU has two modes that allow you to work out calculations like the ones that we are about to look at here: Mth I O and Line I O For simple calculations Line I O mode is the simpler to use.
- Page 3 Calculator steps: Answer = This key will square a number Example 3.3: 56 56 (this means Calculator steps: Answer = 3136 If x = -2.6, find x Brackets must be used when squaring a negative number or raising a negative to any power Calculator Steps: ( (-) 2 ●...
- Page 4 This key is the power key Example 3.5: (this means Calculator steps: 8 Remember to close the bracket after entering the power Answer = 4096 (-0.8) 0 ● 8 ) Calculator steps: Answer = -0.32768 A logarithm is an alternative way of writing a number. It is particularly useful when working with large numbers.
- Page 5 This is the exponent key. It is used when you need to enter a number into the calculator in scientific notation. Example 3.8: Note is the scientific notation form of the number 134 000. The exponent key is 1 ● 3 4 5 ÷...
- Page 6 4. Memory Keys To enter a number into the memory: Example 4.1: Note To enter 852.36 in the memory An M will appear on the display when a number is stored in the Calculator steps: 8 5 2 ● 3 3 SHIFT memory.
- Page 7 Example 5.2: Make sure your calculator is in radian mode Calculator steps: tan 3 x SHIFT ÷ remember to close the bracket Answer = -1 6. Review exercise set 1 Use your calculator to find the value of the following. 18 36 b.
- Page 8 7. Performing calculations Scientific calculators have an in-built order of operations. This means that the calculator will automatically work out operations in questions following the order of operation rules. Using an equal sign within a calculation or using brackets may be necessary at times in order to get the correct solution. Also remember that when using some function keys you need to close a bracket.
- Page 9 Example 7.5 16 46 18 37 5 27 1 6 ● 4 6 - 1 8 ● 3 7 = ÷ 5 ● 2 7 = Calculator steps: Answer = –0.362428842 Example 7.6 523 – Calculator steps: 5 2 3 - 2 7 ÷...
- Page 10 8. Review exercise set 2 Use your calculator to find the value of the following. + 75 Add together –5, –3, –1, 4, 6, 8 and 12 then square the total. 15 8 81 log59 (142 521) 8674 9634 654 2 5 4 4 7 Page 10 of 11 Learning Skills @ CSU...
- Page 11 9. Answers to review exercises Set 1 a. 337.0896 b. 2.537819095 c. 503.4491037 d. 1116.121191 -22 665 187 g. 0.8987940463 Set 2 a. 424 179 b. 12.20655562 c. 6.56 d. 81 e. 66.31909936 0.4771368935 g. –1.467441149 h. 0.02858333 13.54646314 0.159679905 For more information Visit our Learning Skills website at http://www.csu.edu.au/division/studserv/learning/index.html...
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