Question about Texas Instruments TI-84 Plus Silver Edition Graphic Calculator

TI-84 Plus Silver Edition. When dividing negative powers of ten by other negative powers of 10 the calculator it just adds the the negative powers together. How do i fix this? An example: 5*10^-10 / 5*10^-10 = 1*10^-20 I use the correct negative sign and i am normal mode ( I have also tried scientific mode which has not worked) I use the 10^x second button located under the LOG button next to the number 7. Please Help

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To enter an exponent, positive or negative, use the EE (Enter Exponent) key (the shifted function of the , key just above the 7 key). Do 5 2ND [EE] (-) 1 0 / 5 2ND [EE] (-) 1 0 ENTER and you'll see 1.

What I think you're doing (I can't be sure without seeing your keystrokes) is calculating
5*10^-10/5*10^-10 which is interpreted as (5*10^-10/5)*10^-10, which indeed is 10^-20.

Posted on Oct 16, 2010

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