calculator

Activity 1 : Initiating the calculator

In order to set up your calculator to the default settings for courses, turn it on , then enter two key sequences:

(CLR) (Setup) (Yes)

(SETUP) (Norm)

Be aware that in the second key sequence, 'CLR' (which is short for 'clear') is the second function in the key and 'Setup' is an acronym for the menu item that is associated with key. key. "Yes" is the title of the menu on the screen corresponding to that key. This keystroke clears all previous 'setup' settings to the calculator.

When you press the 2nd key, 'SETUP' is the name of the second purpose of key 2. key and 'Norm' (short for 'normal') is the on-screen menu option that corresponds to the keys. Pressing the key allows you to select 'Normal 2' mode, which will be described in greater depth in section 5.

Be aware of the difference between 'SETUP' which is the second function of the key and the menu item "Setup".

Your calculator will now function in 'Math' mode, with the words Math will appear near the right side of the display at the top of the calculator display as shown in Figure 4. The Math Mode is the ideal method of using your calculator in this class because it allows mathematics to be entered and displayed in a similar way to how you write it down on paper.Figure 4 'Math' mode

1.1 Basic calculations

Simple calculations are entered into the calculator in exactly the same order as they are written on paper, as illustrated in the following exercise. The calculator displays the calculation that you enter. When you click the button, the answer is displayed in the lower right of the screen.

Activity 2 Sums, Differences, products, and quotients

Make use of your calculator to calculate how to answer the following calculations.

The answer is revealed

You may have noticed in the fourth part (4) in the above task in the above activity, the calculation was too large to fit on the calculator display. In such circumstances there are symbols like ' "' or ' are displayed to the top or bottom of the screen to indicate that there's more data in this direction. This information is accessible by scrolling to the left or right using keyboards or keys that are located on the left and right sides of the large cursor control button (labelled with the word 'REPLAY') located under the calculator screen.

If you input a long calculation inside your calculator and you observe the cursor (which is usually displayed with the letter ' ') change to ' '. This means that you are permitted to type 10 characters more. If you run into this you need to break down your calculation into smaller parts.

The cursor is a flashing symbol that indicates which item to enter to the calculator will show up.

1.2 Decimals or fractions?

Then, in Activity 1 you set up your calculator to work in Math mode. In this mode, when the outcome of an calculation isn't a full number, it will be displayed as a fraction, for example the possibility of using it whenever possible.

If you want to get the answer in decimal format, you'll need use the key instead of using the key. You are able to switch between the decimal and fractional outputs with the keyboard.

Keep in mind that it is a good idea to ensure that your calculator can be set to Math mode if the word Math is visible at top of the calculator display. If your calculator isn't operating in Math mode, repeat the steps of Activity 1.

Activity 3 Fractions and decimals

Make use of your calculator to find the answer in both fractional and decimal forms.Reveal answer

1.3 Powers

There are numerous keys on the calculator that enable users to do calculations that require power. For smaller powers like squares or cubes there are keys that are specifically designed for them, and keys that are located in the function key in the keypad. These buttons are utilized in a similar manner to the way you write math; for example, to enter a number, the number you have to click . The display will also show mathematics in the same manner as you write it out on paper.

To calculate higher power like , you'll need to use the more universal the power button . This is utilized in a natural fashion. In order to enter the key, you will need keys . Note that after you press the key the small square box appears displayed within the calculator display containing the flashing cursor (' '), which enables that you enter power into the right spot. To move the cursor off of this box and to return to the main display after the power has been entered when you press the right-arrow key on the right side of the large cursor control button.Figure 5 The general power button function

Different models of calculator may feature a button instead of and might not come with specific keys. keys.

Activity 4 Calculating powers

Calculate each of these using your calculator.

The answer is revealed

1.4 Making corrections

If you've made an error in entering a keystroke in the calculator and you are unable to correct the error, you can utilize the editing features to correct your error.

The as well as the keyboards on the cursor control button enable you to change the cursor (shown in the display by the symbol ' ') within the calculation displayed on the calculator screen. The characters are then inserted at the position of the cursor through pressing appropriate buttons, and the items on the left of the cursor could be removed by pressing by pressing the mouse. This can be done either before or after it has been key has been activated. For a re-evaluation of an edited calculation you can press anytime at any time.

In some circumstances in certain situations, it might be easiest to abandon what you've written, and begin again, by pressing the 'all clear' key!

If a serious error is made while entering an calculation in the calculator this could result in the calculation of the answer at any time, because the calculation could not make sense mathematically. In such circumstances a 'Syntax Error' will be displayed as illustrated in Figure 6. The Syntax Error screen offers two options to you:

• Press to abandon the calculation and remove the screen
• Use the button to on either or to return to the erroneous calculation with the editing cursor at the site of the error, ready for a correction to be implemented.

Figure 6 Syntax Error

Other types of calculator errors you might experience include:

• 'Math Error', when the calculation you entered seems mathematically correct, but the result cannot be calculated, such as attempting the division of zero, or if the result is too large too large for the calculator to handle.
• 'Stack Error", if your calculation is too complicated to handle in one go - in such situations, try breaking the calculation into several smaller ones.

Section 4 considers how you can go about doing this.

In these instances when this happens, the calculator will display an identical screen to the one is displayed for Syntax Error, allowing you to choose to abandon or rectify your calculation.