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A Brackets on a Scientific Calculator

# Brackets on a Scientific Calculator

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Do you know why there are two sets of numbers on a scientific calculator, the top and bottom? One of the main functions of the scientific calculator is to do algebraic manipulations, but this function is hard to do without building up a lot of finger strain.

### Calculator

appears at the top left-hand corner of the calculator display to remind you that the button has been pressed. It disappears when you press another key. Some keys also have a third function, printed above the key in red. These functions allow numerical values stored in the calculator memories to be used within calculations and are accessed by pressing the Some calculator operations are accessed through a system of menus that are displayed on the calculator screen, as shown in Figure 3. The required menu option is selected by pressing the number key associated with the option, as given on the calculator screen.

When describing how to use various calculator functions, this guide gives the exact keys that you need to press using the symbols shown on the keys. This is known as a ‘key sequence’. If the key sequence accesses the second function of a key, or a function from a menu, the name of this function will be given in brackets at the appropriate point in the key sequence. Names in brackets are thus not keys that you press but simply describe the function that is accessed using the previous key sequence. For example, to turn off the calculator, press (Source: www.open.edu)

### Scientific

One disadvantage of the way most scientific calculators handle parentheses is evident when more than one pair of parentheses is open at a time. Consider the problem 5 * (2 + 3 * (6 + 8)). Fortunately we can enter the expression exactly as written. The exact way this will look on various calculators may be different but I will explain how it works on mine and you can follow along on yours to see how things work on yours. (Source: fac.hsu.edu)

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