Casio FX-82AU PLUS- Manuals

6  Fractions and decimals The key strokes for fractions are slightly different in the Math mode than in the Line mode. Fractions in the Line mode Use the a button to enter any expression involving fractions in the same way as the z button was used in the past. To enter 1½ + 3¾ press 1a1a2+3a3a4p . A...

7  Remember you can toggle between the answer displayed as an improper fraction, mixed numeral and decimal. Refer to the section ‘answers in different forms‛ on the previous page. Simplifying fractions In either mode the calculator will express a fraction in its simplest form. Enter the fraction fol...

8  Negative, fractional indices The calculator can execute an impressive range of calculations with negative and positive fractional indices. or Occasionally the whole screen can‛t be displayed in the math mode, but the calculation remains possible. Naturally the following calculations can be execut...

9  Powers and roots Determining powers Both screens show the value of 1.5 3 . The button pressing is the same in both modes. 1.5f3p . OR Determining roots The F button is used to determine roots. The screens show the value of the 5 th root of 1024. The button pressing in each mode is shown below the...

10  Trigonometry Before starting any calculations involving trigonometry always check the angle measure for degrees, radians or gradients. If the angle measure isn‛t consistent with the type of angle being used, all answers will be wrong. A D at the top of the screen indicates that the calculator is...

11  Changing a decimal to degrees, minutes and seconds Press SHIFT x to express 57.33908 o in degrees, minutes and seconds. Changing radians into degrees or degrees into radians When you are converting angle types you MUST have the calculator set to the type of angle you are converting INTO. Radians...

12  The statistics menu Hint! When you are going to work in statistics start with the calculator turned off. Then you know all the statistics memories are empty. The data is cleared automatically when the calculator is turned off or the statistics menu is exited. Turn the calculator on. After you ha...

13  The options for statistics are in 3. Press 3 to view the options. Press 1 if you want to have a separate list for frequencies and 2 if you want to enter scores w ithout frequencies. Example Let‛s find the summary statistics for the following set of scores. 4, 6, 2, 8, 3, 9, 12, 6, 4, and 5. Step...

15  Press C when you have completed the data entry stage. Don‛t panic when the scores disappear. The process for finding the mean and standard deviation is the same as outlined in the example using scores without frequencies. In the scores with frequencies example the mean is 5.1 and the standard de...

16  Using the memories The calculator has an independent memory that can store the result of a calculation. In addition there are six pronumerals A, B, C, D, X and Y w hich may be assigned values. The independent memory M Before you start using the memory, check that there is nothing in the memory. ...

18  Trouble shooting The calculator is using a comma in place of a decimal point Solution: In ‘display‛, ‘comma‛ has been selected instead of ‘dot‛. In the calculations menu press SHIFT MODE (SET UP) then arrow down by pressing the bottom of the round replay button. Press 4 (for display). Then press...

19  The calculator is recalling the wrong value for a value in the memory You must clear the memory before placing a new value in the memory. The clear function is the second function on 9 . Press SHIFT 9 then follow the instructions on the screen. The calculator is frozen In the middle of the back ...

20  Fractions and Decimals Remember!   When you have a fraction or a decimal displayed on the screen pressing the  n  button  will allow you to toggle between decimal and fractional representation. Pressing  SHIFT  n   will toggle between an improper fraction and mixed numeral representation for  ex...

21  Percentages   1   The screen shot shows the calculator converting 25% to a fraction.  Enter 25% by pressing  25 SHIFT (  followed by p  to check the value of  25% as a fraction.   2   Express each percentage as a fraction.   A  50%   B   75%   C   40%   D   5%   E   100%  F  200%   G   1  2  %  ...

22  Working with fractions   Practise the calculator fractions skills outlined on pages 6 and 7 with the following questions that involve fractions. Remember to use the round replay button to position the cursor correctly when you are using MathIO.   1.   Evaluate  1 3  2 4 +   and express your answ...

23  Fix, scientific notation and norm Remember!   When you want to cancel fix or scientific notation choose Norm2. Refer to page 5 for fix and scientific notation procedures.   1.   Express 65 123 in scientific notation with 2 significant figures.   2.   Express  3  6.8 10 ´   without using scientif...

24  Roots and exponents   Button procedures for roots and exponents are on pages 7 to 9. Remember that you can use the  n  button to toggle between fractions and decimals if you want your answer in a  different form.   1.   Use the  d  button to find the value of the following squares.   A   2  5   ...

25  Trigonometry The instructions for working with trigonometry are on pages 10 and 11. Check your calculator settings!   The statement  0  sin 30 0.5 =   is correct. Explain why both of the following calculator  screens are displaying the wrong value for  0  sin 30  .  Set your calculator to degree...

26  Statistics   The button pressing sequence for statistics is on pages 12 to 15.  Remember! ·   When you have finished entering the data you must press  C  to tell the calculator  that you have completed entering the scores. ·   When you press SHIFT 14   then  2  to bring up the value of the mean ...

27  Using the memories Remember!   You must clear the memory before you place anything in the memory. If you forget to clear the memory the calculator will add the new value to the value that is already in the memory. The instructions for clearing the memory are on page 16.   1   In which of the fol...

29  Logs, natural logs and e   The calculator uses  g  for log base 10 and  h  for log base  e . You don’t have to  remember which button is which. All you need to do is look at the second function above each button. The  g  button has  G  above it reminding you that the  g  button is base  10. Simi...

30  Gallipoli Australia and New Zealand joined the First World War 1   In 1915 soldiers from Australia and New Zealand joined allies fro m Britain, France and India to fight against soldiers from Turkey in the Gallipoli Campaign. As you work through this set of questions you will learn ab out some o...

32  Waiting time investigation   On average, how long do customers wait in your school canteen q ueue b efore they have completed their purchases?  In this activity you will b e investigating this q uestion and evaluating the results.  Equipment required ·   A watch that measures time in minutes and...

33  Playing dice simulation Simulation 1   When you ro ll a pair of normal, 6 ­sided d ice together and add the numbers showing, what is the most likely total?  What you have to do ·   Enter the formula RanInt#(1,6) + RanInt# (1 ,6 ) into your calcu lator. Each time you p ress  p   the calculator wi...

34  Subtracting dice Bingo The game rules ·   The values called in this game of bingo will b e determined by subtracting the numbers showing on a p air of normal 6­sided dice. T he subtraction will always be the b igger valu e subtract the smaller value. There will be no negative values. ·   Players...