calculator

1. Initialising your calculator

To start setting the calculator to the default course settings, turn on the calculator and then enter the following 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 purpose on the key, and 'Setup' is it's name for an on-screen menu option that corresponds to that key. "Yes" is the name of the on-screen menu option corresponding to the key. This key sequence clears the previous settings in the calculator.

in the next key sequence "SETUP" is the title of the second function of key 2. key, and 'Norm' (short for 'normal') is the on-screen menu option for this keyboard. Pressing the key switches to 'Normal 2 mode', which will be explained in more detail in section 5.

Be aware of the difference between 'SETUP', which is the secondary function for the key and the menu choice 'Setup'.

Your calculator will now be working in Math mode as well as the term Math is displayed on the right-hand side of the high-end of the calculator display as shown in Figure 4 below. The Math Mode is the preferred method of using your calculator throughout this course since it lets mathematics be filled in and displayed in a similar way to how you would write it on paper.Figure 4 : Math mode

1.1 Basic calculations

Basic calculations are input to the calculator in exactly the same sequence as when they are written on paper, as shown in the next exercise. The calculator will display the calculation that you enter. When you press , the answer is displayed in the lower right corner of the screen.

Activity 2 Sums, Differences, products and products and

Make use of your calculator to figure out the answers to the following calculations.

Find the answer

You may have noticed that in the fourth part (4) of previous task it was apparent that there was a problem with the calculation was too long to fit on the calculator display. In such circumstances there are symbols like ' ' or ' "'" appear to the left or right of the screen to indicate that there is more information available in that direction. This information can be seen by scrolling left or right using buttons keys. keys that are located on the left and right side of the large cursor control (labelled with the words 'REPLAY') located under the calculator screen.

If you input a long calculation inside your calculator, then you may notice the cursor (which is usually shown as ' ') change to ' '. It means that you're allowed to type only 10 characters. If you experience this issue that happens, you should break up your calculation into smaller portions.

The cursor will flash a symbol indicating what the next input in the calculator will show up.

1.2 Fractions or decimals?

Within Activity 1 you set up your calculator to work in Math mode. When in this mode the result of an calculation is not a complete number, it will be shown as a fraction like the case where it is possible.

For the answer to be displayed in decimal format, you'll need hold instead of the key, or you can switch between decimal and fractional outputs with your keys.

Be aware that the calculator is in Math mode if Math is visible at very top of the calculator display. If your calculator is not operating in Math mode, repeat the steps in Activity 1.

Activity 3 Fractions, decimals and decimals

Use your calculator to determine both fractional and decimal forms.Reveal the answer

1.3 Powers

There are numerous keyboards in the calculatorthat allow users to do calculations involving powers. For smaller powers, such as cubes and squares, there are special buttons as well keys that are located in the function keys space of the keypad. They are used in the same way as how you write mathematics for instance, to enter, you press . The display will also show mathematics in the same method as you would write it on paper.

To calculate higher powers such as , you need to use the general Power key . This is also used in a natural fashion. To enter this, you have to enter keys . When you press the key you will see a small area shown at the top of the calculator display with a flashing cursor (' '), which enables for you to type in the power into the right spot. If you want to drag the cursor from this box and back to the main display line when the power is entered using the right arrow key at the right-hand part of the big cursor button.Figure 5 shows the general power key function

Others models of calculator could have a button instead of and might not have particular keys and keys.

Activity 4 Calculating power

Calculate each of the following with your calculator.

Answer the question

1.4 Making corrections

If you've made mistakes when entering a key sequence in the calculator You can utilize the editing features to correct the error.

This as well as the keys on the large cursor control allow you to move the cursor (shown on the display in the form of ' ') within the calculation within the calculator screen. Characters can then be added into the location of the cursor using the buttons, and the items on the left of the cursor can be erased using key key. This can be done either ahead of and after that key has been press. To re-evaluate an edited calculation, simply press the key at any point.

In certain circumstances in certain situations, it might be best to simply delete what you've typed and begin over, pressing the "all clear" key!

If a major error is committed when entering an calculation into the calculator and it is unable to allow the answer from being calculated any point, since the calculation might not make mathematical sense. If this happens, a 'Syntax Error' is displayed as illustrated in Figure 6. The Syntax Error screen will give you two options:

• Then press to abandon the calculation and remove the screen
• Use the button to either either to return to the incorrect calculation by dragging the cursor at the site where the error occurred, in readiness for a correction be implemented.

Figure 6 Syntax Error

Other types of calculator errors you might be faced with include:

• 'Math Error', when the calculation you entered has mathematical logic, but the result is not able to be calculated, like trying division by zero, or when the outcome is too large enough for the calculator to manage.
• "Stack Error", if your calculation is too complicated to be completed in one go - in such situations, try breaking the calculation into a number of simpler ones.

Section 4 considers how you can accomplish this.

In these situations when this happens, the calculator will display the same display as to the Syntax Error, allowing you to either abandon or change your calculation.