calculator

1. Initialising the calculator

To initialise your calculator to the default course settings, turn it on and enter the two key sequences:

(CLR) (Setup) (Yes)

(SETUP) (Norm)

It is important to note that in the initial key sequence, "CLR" (which is short for 'clear') is the second purpose in the key, and 'Setup' is what is the title of the on-screen menu item that is associated with this number. "Yes" is the name of the menu item on screen in relation to key button. The key sequence is able to clear all settings previously set up in the calculator.

in the next key sequence "SETUP" is the title of the function 2 of key 2. key, and 'Norm' (short for "normal") is the on-screen menu option that corresponds to key 2. button. The key press toggles the use of 'Normal 2 mode'. This is described in greater detail in section 5.

Take note of the differences between 'SETUP' as the second function of the key and the menu choice "Setup".

Your calculator will now operate in Math mode as well as the term Math will be displayed near the right-hand top of the calculator display as shown in Figure 4. Math mode is the recommended method to use your calculator during this course because it allows mathematics to be filled in and displayed in a like way as you write it on paper.Figure 4 Math mode

1.1 Basic calculations

Fundamental calculations are entered to the calculator in exactly the same sequence as when they are written on paper. This is demonstrated in the following exercise. The calculator displays the calculation that you enter. When you click the button, the answer appears at the bottom right side of the screen.

Activity 2 Sums, Differences, products, and Q quotients

Use your calculator to find how to answer the following calculations.

Reveal answer

It is possible that in the first part (4) from the previous task this calculation was too long to fit on the calculator display. When this happens the symbols ' ' or ' ' are displayed to the left or right side of the display , indicating that there's more data in the direction of. This information can be viewed by scrolling left and right using keypads keypads and keys located at the right and left sides of the large cursor control (labelled by the word 'REPLAY') located under the calculator screen.

If you are typing a lengthy calculation inside your calculator or calculator, you might be able to observe that the cursor (which is usually displayed by the letters ' ') change to ' '. This means you're allowed to type only 10 additional characters. If you run into this then you must break the calculation into smaller pieces.

The cursor will flash a symbol indicating where the next entry within the calculator will be displayed.

1.2 Decimals or fractions?

When you are in Activity 1 you set up your calculator to operate in Math mode. In this mode, when the outcome of an calculation does not represent a complete number, it will be displayed as a fraction, like whenever it is possible.

To get the answer in decimal form, you'll need be pressing instead pressing, or you could switch between decimal and fractional results by pressing this number key.

Remember, this is the time to make sure that your calculator has entered Math mode if Math is displayed at the center of the calculator display. If your calculator isn't working in Math mode, follow the steps of Activity 1.

Activity 3 Fractions, decimals and decimals

Utilize your calculator to find answers in fractional and decimal forms.Reveal the solution

1.3 Powers

There are a variety of keys on the calculator that enable you to perform calculations which require powers. For smaller powers like squares or cubes there are designated buttons along with those are situated in the function area of the keypad. These are operated in a similar manner to how you would write mathematics in the past, for example, to enter, you enter by pressing . The display also displays the math in the exact way as you would write it on paper.

To calculate higher powers such as , you need to make use of the more general Power key . This is utilized in a natural manner. To enter the key, you will need to enter the sequence of keys . Note that after you press the key there is a small circle shown at the top of the calculator display with a flashing cursor (' ') that allows users to input the key into the right spot. If you want to drag the cursor from this box and return to the main line of the display when the power is entered you need to press the right arrow key at the right-hand part of the big cursor button.Figure 5 shows the general function of the power key

Other models of calculator could have a button instead of and might not come with particular keys keys. keys.

Activity 4 Calculating power

Calculate each of these using your calculator.

Answer the question

1.4 Making corrections

If you've made mistake while entering a key sequence into the calculator If you make a mistake, you can use the editing facilities to correct your error.

Keys as well as the keyboards on the control for the cursor let you move the cursor (shown in the display in the form of ' ') within a calculation displayed on the calculator screen. Characters can then be added at the point of the cursor using the buttons and items to the left of the cursor may be removed by pressing the button. It is possible to do this either before or after when the key has been pressed. If you want to re-evaluate an edit calculation just press at any point.

In certain circumstances but, it may be more efficient to delete the information you've typed and begin over, pressing the 'all clear' button!

If a major error is committed when entering an calculation into the calculator that could stop the answer from being calculated any time, because the calculation could not make mathematical sense. In these instances, a "Syntax Error' screen will appear such as in Figure. The Syntax Error screen will give you two options:

• Then press to abandon the calculation and clear the screen
• Click the button to either the button to either to go back to the incorrect calculation with the editing cursor at the site of the error, ready for corrections to be completed

Figure 6 Syntax Error

Other kinds of calculator error that you could run into include:

• 'Math Error', when the calculation you entered makes mathematical sense but the result is not able to be calculated, like trying the division of zero or if the calculation is too large to the calculator to process.
• 'Stack Error', when you're calculation is too complex to be completed in all at once - in these situations, try breaking the calculation into a series of smaller ones.

The section 4 discusses ways that you might do this.

In these situations, the calculator will show a screen similar to that for the Syntax Error, allowing you to decide whether to correct or abstain from your calculation.