Question about Texas Instruments TI-30XA Calculator

# How to enter 2.5x10 (exponent 8)/2.25 x10 (exponent5)

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Key sequence is:

2.5
X
8
2nd
10 to the power x
/
2.25
X
5
2nd
10 to the power x
=

Unless you mean (2.5x10 (exponent 8))/(2.25 x10 (exponent5)), in which case you need to change the last "X" in the sequence to "/", or stick the appropriate brackets into the sequence.

Note that exponents are like trig functions, enter value first, then the operator, so 10 (exponent 8) is entered as "8", "2nd", "10 to power x", just like sin 60 is entered "60", "SIN"

Posted on Dec 31, 2008

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## Related Questions:

### How to do power exponent

You may have a caret ^, or X^y or Y^x. Enter the base, press the key then enter the exponent. If exponent is negative, precede it with the change sign key (-) or (+/-). To enter powers of 10 in scientific notation, use a key marked EE, or Exp, or x10^X

Mar 24, 2012 | Computers & Internet

### How are numbers in scientific notation entered in Aurora SC150X calculator

Look for a key that is marked EE, or Exp, or x10^x. To enter a number in scientific notation, you enter the decimal part, then press the Enter Exponent key, followed by the exponent. If exponent is negative, you precede it with a press of the change sign key (-).
Once a number is entered there is no special treatment: multiply it divide, or add it.

Mar 16, 2012 | Aurora Electronics SC150X Scientific...

### How does one enter a number in scientific notation in SC150X calculator

Look for a key that is marked EE, or Exp, or x10^x. To enter a number in scientific notation, you enter the decimal part, then press the Enter Exponent key, followed by the exponent. If exponent is negative, you precede it with a press of the change sign key (-).
Once a number is entered there is no special treatment: multiply it divide, or add it.

Mar 16, 2012 | Aurora Electronics SC150X Scientific...

### I need step by step instructions on using Casio fx-115ES ee or exp burron.

The equivalent of the EE or EXP button on the Casio Fx-115ES is marked as x10^X. It is located at the bottom right of the key pad left of the = key.
To enter the power of 10 in a number written in scientific notation, you press the x10^X button followed by the exponent. If the exponent is negative you press the change sign key first [(-)] , then the one or 2 digits in the exponent.
Example Enter the mass of the proton m_p in kilograms
1.6726217 [x10^X] [(-)]27 [=]
In grams the value above is multiplied by 1000.
or
1.6726217 [x10^X] [(-)]24 [=]

Since the calculator has the physical constants (the FX-991ES definititely has them)
1. Display the proton mass in kilograms
2. [SHIFT ][7] to open the constants catalog,
3. type 01 for the proton mass, then press the [x^-1].
4. Divide the result by 1000
5. You should get 5.978638635 x10^23

Feb 07, 2012 | Casio FX-115ES Scientific Calculator

### I need help calculating how many protons are in 1gram

The equivalent od the EE or EXP button on the Casio Fx-115ES is marked as x10^X. It is located at the bottom right of the key pad left of the = key.
To enter the power of 10 in a number written in scientific notation, you press the x10^X button followed by the exponent. If the exponent is negative you press the change sign key first [(-)] , then the one or 2 digits in the exponent.
Example Enter the mass of the proton m_p in kilograms
1.6726217 [x10^X] [(-)]27 [=]

Feb 07, 2012 | Casio FX-115ES Scientific Calculator

### I need to know how to divide, mutiply, add, and substract in scienctific notation on my Casio fx-300ES

The "problem" is not how to calculate with numbers expressed in Scientific Notation but how to enter a number given to you in scientific notation. Once the number is entered you do not have to do anything special. If you have to multiply it use the (x) button. to add it use the + button, etc.

How to enter a number in scientific notation.

Type in the mantissa (example 6.022)
Press the [X10^x] at the bottom of keypad.
Enter the exponent (example 23)
with this example you will have entered Avogadro's number 6.022x10^23
Other example
1.6 [X10^x] (-) 19 enters the electron charge in Coulombs. The exponent is negative that is why you press the change sign key (-).

Aug 24, 2011 | Casio fx-300ES Calculator

### Where is the exponent key on Casio fx-115es calculator?

To raise 10 to an exponent, use the 10^x function (SHIFT log). To raise e to an exponent, use the e^x function (SHIFT ln). To raise an arbitrary value to an exponent, use x^y (just above the sin key). To enter an exponent of ten, use the x10^x key to the right of the decimal point.

Oct 27, 2010 | Casio FX-115ES Scientific Calculator

### Exponents

To enter decimal exponents, use the x10^x key below the 3, followed by the exponent. For example, to enter one million, press 1 x x10^x 6 and see 1000000 (actually, the leading one is optional: if you press x10^x without a value, the calculator will supply a 1).

To raise a value to a number, use the x^ key above the sin, followed by the exponent. For example, to calculate 2^3, press 2 x^ 3 = and see 8.

Sep 07, 2010 | Casio FX-115ES Scientific Calculator

### I don't know how to use the calculator enough to figure scientific notations

Scientific notation is a number format that has the following structure (d stands for digit)
one digit decimal mark several other digits [times] 10 raised to power of exponent
d [decimal mark] dddddd...[x] 10^ (-) dd

Here are two examples the last two results. The number of digits after the decimal mark is select by the user depending on the number of significant digits in the data. The exponent can be positive or negative.

In you case, to enter x10^ you press the [EE] key (no 10 is entered) the sign of the exponent and the value of exponent.

Aug 22, 2010 | Texas Instruments TI-89 Calculator

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