The Casio fx-260 Calculator

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
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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
©2008 by The GED Academy. You are licensed one copy of this document for personal use only. Any other
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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.
©2008 by The GED Academy. You are licensed one copy of this document for personal use only. Any other
reproduction or redistribution is prohibited. All rights reserved. w w w . p a s s G E D . c o m
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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
3. The answer, 55, should appear on the screen.
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
left of the calculator, and then press the
square root sign appears above the button:
key in the upperkey in the top row. A
, 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
3 . The answer, 5, should appear on the screen.
©2008 by The GED Academy. You are licensed one copy of this document for personal use only. Any other
reproduction or redistribution is prohibited. All rights reserved. w w w . p a s s G E D . c o m
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Math Smart
EXAMPLE
———
What is the square root of 45 + 4? or √45 + 4
1. Press
or
2 . Press
3. The answer, 7, should appear on the screen.
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
3. The answer, 6, should appear on the screen.
Learn More about the Casio f-260 Solar Scientific Calculator:
http://www.passGED.com/links/category/casio-fx260-calculator/
©2008 by The GED Academy. You are licensed one copy of this document for personal use only. Any other
reproduction or redistribution is prohibited. All rights reserved. w w w . p a s s G E D . c o m