Question about Casio FX-115ES Scientific Calculator

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It's marked x10^x and is on the bottom row between the decimal point and the Ans.

Posted on Sep 10, 2010

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Posted on Jan 02, 2017

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SOURCE: EE button ("enter exponent" button) Retuns Wrong Value

You're pressing the wrong key. If you want a negative exponent, use the change-sign key ([+<>-] is the closest I can come to drawing the key here), not the subtract key.

Posted on Feb 05, 2010

SOURCE: How would you do negative

Use the (-) key for negative numbers (not just exponents) instead of the - key. The - is to subtract one value from another, (-) is to input a negative value.

Posted on Sep 09, 2010

Two keys can be used to enter negative exponents on the TI-30Xa scientific
calculator; the [y^x] key or the [EE] key. The [y^x] key is used for
all exponents while the [EE] key is used for scientific notation only.

The examples below will demonstrate how to use both keys:

1) Entering 7^-2.

• Press [7] [y^x] [2] [+/-] [=].

• The calculator will display: 0.20408163.

2) 1*10^-3.

• Press [1] [EE] [3] [+/-] [=].

• The calculator will display: 0.001

The examples below will demonstrate how to use both keys:

1) Entering 7^-2.

• Press [7] [y^x] [2] [+/-] [=].

• The calculator will display: 0.20408163.

2) 1*10^-3.

• Press [1] [EE] [3] [+/-] [=].

• The calculator will display: 0.001

Sep 18, 2011 | Texas Instruments TI-30XA Calculator

6 . 0 2 EE 2 3 * 8 . 6 5 EE 4 =

The EE (enter exponent) key is located just above the 7 key. If you want a negative exponent, make sure you use the +/- key located just to the right of the decimal point key instead of the - key.

The EE (enter exponent) key is located just above the 7 key. If you want a negative exponent, make sure you use the +/- key located just to the right of the decimal point key instead of the - key.

Aug 30, 2011 | Texas Instruments TI-30XA Calculator

Depending on your version of the TI-30, you will either find a button with a y to the exponent of x or a button that is the carot (^) sign. you would type (1.0075)^(-240), where ^ is the appropriate button (y^x or just ^).

Jul 18, 2011 | Computers & Internet

For an exponent of ten, use the EE (Enter Exponent) key located just above the 7 key.

Apr 12, 2011 | Texas Instruments TI-68 Calculator

2 to the 10th power

Aug 31, 2010 | Texas Instruments TI-30XA Calculator

If you use the exponent rules you do not need to use a

calculator for this particular case. Anyway to enter power of 10 exponents you use the [EE] key. See screen capture below.

20 [EE] (+ -)9 [X] 1[EE] (+ -) 9

calculator for this particular case. Anyway to enter power of 10 exponents you use the [EE] key. See screen capture below.

20 [EE] (+ -)9 [X] 1[EE] (+ -) 9

Aug 12, 2010 | Texas Instruments TI-30XA Calculator

You need the [EE] key to enter powers of 10 exponents.

You need the change sign key [+/-] key.

You need the [LOG] key.

pKa: 6.5 [EE] [+/-] 5 [LOG] [+/-]

There are two change sign: The first (either before or after the exponent 5), the last is entered after you press the log key , so as to negate (make negative if result is positive, and make positive is result is negative) the value.

The result should be 4.1870866 or 4.19

You need the change sign key [+/-] key.

You need the [LOG] key.

pKa: 6.5 [EE] [+/-] 5 [LOG] [+/-]

There are two change sign: The first (either before or after the exponent 5), the last is entered after you press the log key , so as to negate (make negative if result is positive, and make positive is result is negative) the value.

The result should be 4.1870866 or 4.19

Mar 08, 2010 | Texas Instruments TI-36 X Solar Calculator

There's a key marked "EE" (for Enter Exponent) just above the "7" key. This key is used to enter decimal exponents. To enter 1x10^23, press 1 EE 2 3

For exponents to other bases, use the y^x key just above the divide key.

For exponents to other bases, use the y^x key just above the divide key.

Mar 05, 2010 | Texas Instruments TI-36 X Solar Calculator

Hello,

I dont think you got a lemon.

You acn always enter the powers of 10 as 10, [y^x], but is is less efficient than the EE key

This EE representation is a shortcut.

If you want 10 to the 5th power you just enter [2nd] [EE] 5 and the calculator displays 100000. Of course if you need any other number multiplying the power of ten you enter the following e.g. 2.677[x][2nd][EE]5.

You will not get any error with a positive exponent. But if your exponent is negative you should use the change signe key to the left of ENTER and symbolized by (-)

To avoid all errors I would use parentheses to enclose my exponent.

Here is how to explain the seemingly erroneous result

10 [EE] 5 ) (-) is interpreted by your calculator as 10x(10^(-5)) which evaluates correctly to 0.0001 because [EE] by itself stands for 10^ .

Hope it clarifies this point for you.

By the way some new calculators (Casio) don't have this EE key. Instead you find a key labeled x10^X .

Hope it helps

I dont think you got a lemon.

You acn always enter the powers of 10 as 10, [y^x], but is is less efficient than the EE key

This EE representation is a shortcut.

If you want 10 to the 5th power you just enter [2nd] [EE] 5 and the calculator displays 100000. Of course if you need any other number multiplying the power of ten you enter the following e.g. 2.677[x][2nd][EE]5.

You will not get any error with a positive exponent. But if your exponent is negative you should use the change signe key to the left of ENTER and symbolized by (-)

To avoid all errors I would use parentheses to enclose my exponent.

Here is how to explain the seemingly erroneous result

10 [EE] 5 ) (-) is interpreted by your calculator as 10x(10^(-5)) which evaluates correctly to 0.0001 because [EE] by itself stands for 10^ .

Hope it clarifies this point for you.

By the way some new calculators (Casio) don't have this EE key. Instead you find a key labeled x10^X .

Hope it helps

Mar 12, 2009 | Texas Instruments TI-30XA Calculator

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