the casio fx-260 calculator h ere is what the … math smart the casio fx-260 calculator h ere is...

632 Math Smart

The Casio fx-260 Calculator

H ere is what the Casio fx-260 Solar Calculator looks like:

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Math Smart 633

Starting Up the Calculator

W hen you first use the calculator, you’ll want to press the button in the upper right-hand corner. In small letters,

you’ll see DEG at the top of the screen, and you’ll see a 0 in the right of the screen. The calculator has different modes, and you’ll need the DEG mode to use your calculator for the test. If you see something other than DEG in the upper part of the screen, press

, and DEG should appear.

When you’re done with a problem and starting a new problem, press the key or press the red key to clear the calculator. This will clear all the work you’ve done. Hint: Use the

key to clear the last thing you entered or the key to erase just one number you’ve entered.

Basic Adding, Subtracting, Multiplication, and Division

T o do basic math problems, just enter the math problem as you see it or as you would write it. The calculator knows the

order of operations, so you can enter the problem exactly as you see it, with any combination of operations. When you’re done, press the equal key to get the answer. It won’t give you the answer until you press the equal key!

EXAMPLE

5 + 3 × 4

1 . Press or


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2. Press

3. The answer, 17, should appear on the screen. Notice that the calculator applies the order of operations. It multiplies three and four before it adds five.

Math Problems That Use Parentheses

P arentheses in math problems indicate a part of the problem that needs to be done first. Luckily, the Casio fx-260 can use

parentheses, so you can enter a problem with parentheses into the calculator, and it’ll do the work for you. The open and close parentheses buttons look like this: .

EXAMPLE

(2 + 9) × (44 − 3)

1 . Press or

2. Press

3. The answer, 451, should appear on the screen.

Sometimes, a number that’s meant to be multiplied with an expression that’s in parentheses just appears next to the parentheses, without a multiplication symbol. When you enter the problem, you’ll need to add a multiplication symbol.


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EXAMPLE

5(2 + 9)

This means to multiply 5 times the sum of 2 and 9

1 . Press or

2. Press


Square Roots

T he calculator can find the square root of a number or of an expression. To find a square root, first enter the number (or

expression in parentheses), then press the key in the upper-left of the calculator, and then press the key in the top row. A square root sign appears above the button: , to show that the

function of that key is to find the square root. Remember, press first, then . Don’t press them at the same time.

EXAMPLE

What is the square root of 25? or √—25

1 . Press or

2. Press



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EXAMPLE

What is the square root of 45 + 4? or √—45

— +

— 4

1 . Press or

2. Press


Negative Numbers

N egative numbers can be quite a problem, because it’s easy to forget about a negative number sign. Make sure, when

you’re using negative numbers, to enter them properly into your calculator.

To enter a negative number, first enter the number and then press the key, which changes the sign of the number.

EXAMPLE

10 + −4

1 . Press or

2. Press


Learn More about the Casio f-260 Solar Scientific Calculator: http://www.passGED.com/links/category/casio-fx260-calculator/


the casio fx-260 calculator h ere is what the … math smart the casio fx-260 calculator h ere is...

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