Every time I try to calculate 1000-490= It turns the 1000 into -1000 and will not do the calculation at all unless I punch it in like 1000-490+= but then the answers are all negatives.

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Yeah, this calculator is kind of odd in that the keys to the left of the numbers ([÷], [×] and [=]) work more like standard calculators, but the keys to the right ([-] and [+]) work more like they're RPN (more common on HP calculators). To calculate 1000-490, type "[CE/C] 1000 [+] 490 [-]". What happens is this: after clearing then entering 1000, the [+]adds it to the last result (in this case 0), giving us 1000. This number is saved when you enter 490, and pressing [-] subtracts it from the last result (1000), giving you 510.

Posted on Feb 14, 2007

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That depends on how simple a calculator. I'll give some examples below for calculating the cube root of 8.

On a TI-86, press 3 2nd [MATH] F5 MORE F4 8 ENTER

If the calculator has a "^" or "y^x" key, raise 8 to the 1/3 power. Again, on the TI-86, press 8 ^ ( 1 / 3 ) ENTER

If the calculator has a logarithm key, take the logarithm, divide it by three, then take the antilogarithm. Again, on the TI-86, press 2nd [e^x] ( ln 8 / 3 ) ENTER

On a slide rule, place the hairline over the number on the K scale and read the cube root on the D scale.

On a TI-86, press 3 2nd [MATH] F5 MORE F4 8 ENTER

If the calculator has a "^" or "y^x" key, raise 8 to the 1/3 power. Again, on the TI-86, press 8 ^ ( 1 / 3 ) ENTER

If the calculator has a logarithm key, take the logarithm, divide it by three, then take the antilogarithm. Again, on the TI-86, press 2nd [e^x] ( ln 8 / 3 ) ENTER

On a slide rule, place the hairline over the number on the K scale and read the cube root on the D scale.

Jan 10, 2013 •
Texas Instruments TI-86 Calculator

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2answers

I had this problem also and just fixed it. I hit 2nd key...don't hold it, (it should say 2nd in the lower left corner across from the DEG) then click the K button (also the divide key). The arrow and DEG will remain, but do not affect simple math calculations. Hope this helps!

Feb 09, 2011 •
Texas Instruments TI-30 XIIS Calculator

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Sounds like you could have $100.00 in your memory. The LCD will show your current calculation but the print out might include anything you added to M+/-. Try clearing your M*

Jun 17, 2010 •
Victor 2640 Calculator

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Press the MATH key to bring up the Math menu. Option 3 gives you cubed, option 4 gives you cube root, option 5 gives you nth root.

For example, 3rd root of 8: MATH 4 8 ENTER gives 2.

4th root of 16: 4 MATH 5 16 ENTER gives 2.

For example, 3rd root of 8: MATH 4 8 ENTER gives 2.

4th root of 16: 4 MATH 5 16 ENTER gives 2.

Apr 01, 2010 •
Texas Instruments Office Equipment &...

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Hi,

The calculator has two Input/Output modes: MthIO and LineIO. Since I do not know exactly what you mean by "basic math" mode or "basic form" I must summarize some properties of each mode so that you can recognize your "basic math" mode.

To set the LineIO as the default, you press the key sequence: [SHIFT][MODE] (SETUP) and select [2:LineIO].

Hope it helps.

Thank you for rating the solution.

The calculator has two Input/Output modes: MthIO and LineIO. Since I do not know exactly what you mean by "basic math" mode or "basic form" I must summarize some properties of each mode so that you can recognize your "basic math" mode.

- In MthIO, you have access to the multistory templates to enter fractions with a horizontal fraction bar etc. the exponents for the powers are raised above the main line, etc.
- In LineIO, what you enter in calculator is all on the same line, fraction and radical results are displayed as decimal numbers, etc.

To set the LineIO as the default, you press the key sequence: [SHIFT][MODE] (SETUP) and select [2:LineIO].

Hope it helps.

Thank you for rating the solution.

Dec 14, 2009 •
Casio FX-115ES Scientific Calculator

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Hello,

Unlike other, less sophisticated calculators, the TI83Plus /TI84Plus /TI84Plus Silver Edition do not have a simple key or a command for improper fractions. However there is a command -->Frac accessible through**[MATH] key [1:-->Frac]** that expresses a result in a proper fraction format.

Here is how you would enter you calculation

3+ 1/2 +4+1/8 [MATH][1:-->Frac][ENTER] result is 61/8

You can also ease a bit on the typing by mentally adding 3 and 4

7+ 1/2 +1/8 [MATH][1:--Frac][ENTER]

You should know about the other command that converts a fraction in decimal format.**[MATH][2:-->Dec][ENTER] **

If you enter this command just after the one handled above, your screen shows [Ans][-->Dec] on one line and the result 7.625 on the next. If you do not enter a number the calculator uses the last CALCULATED result, which is stored in the system variable [Ans]

Hope it helps

Unlike other, less sophisticated calculators, the TI83Plus /TI84Plus /TI84Plus Silver Edition do not have a simple key or a command for improper fractions. However there is a command -->Frac accessible through

Here is how you would enter you calculation

3+ 1/2 +4+1/8 [MATH][1:-->Frac][ENTER] result is 61/8

You can also ease a bit on the typing by mentally adding 3 and 4

7+ 1/2 +1/8 [MATH][1:--Frac][ENTER]

You should know about the other command that converts a fraction in decimal format.

If you enter this command just after the one handled above, your screen shows [Ans][-->Dec] on one line and the result 7.625 on the next. If you do not enter a number the calculator uses the last CALCULATED result, which is stored in the system variable [Ans]

Hope it helps

Sep 12, 2009 •
Texas Instruments TI-83 Plus Calculator

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Hello,

Try resetting calculator to default configuration.

[2nd][MEM][7:Reset][2:Defaults][2:reset]. Then [CLEAR] screen.

Hope it solves your problem.

Try resetting calculator to default configuration.

[2nd][MEM][7:Reset][2:Defaults][2:reset]. Then [CLEAR] screen.

Hope it solves your problem.

Aug 18, 2009 •
Texas Instruments TI-83 Plus Calculator

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1answer

cant solve simple problems

Apr 21, 2009 •
Texas Instruments TI-30 XIIS Calculator

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