TI-89 Exact/Approx Answers: How to Get Approximate Results with "AUTO" Mode

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Discussion Overview

The discussion revolves around obtaining approximate results using the TI-89 calculator when the Exact/Approx mode is set to "AUTO." Participants explore methods to achieve approximate answers without needing to switch modes or recalculate.

Discussion Character

  • Technical explanation
  • Homework-related

Main Points Raised

  • One participant inquires about getting approximate answers with the "AUTO" setting without switching to "approx."
  • Another participant suggests pressing the Diamond button before hitting ENTER to obtain approximate results.
  • A participant proposes entering a decimal in one of the numbers (e.g., using 4. / 3 instead of 4 / 3) as a method to get an approximate answer.
  • It is mentioned that multiplying an exact number answer by 1 can also convert it to a decimal.

Areas of Agreement / Disagreement

Participants provide various methods to achieve approximate results, but there is no consensus on a single best approach. Multiple suggestions are offered, indicating a range of techniques that may be effective.

Contextual Notes

Some methods depend on specific inputs or calculator settings, and the effectiveness of each approach may vary based on the context of use.

Who May Find This Useful

Users of the TI-89 calculator looking for ways to efficiently obtain approximate results while using the "AUTO" mode setting.

cscott
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With the Exact/Approx set to "AUTO" in the mode menu, how can I get approximate answers without going and switching it to approx then recalculating?
 
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Before you press ENTER to solve, press the Diamond button.
 
Woot! Thanks!
 
cscott said:
With the Exact/Approx set to "AUTO" in the mode menu, how can I get approximate answers without going and switching it to approx then recalculating?

Put a decimal in one of the numbers, i.e., instead of entering 4 / 3, enter 4. / 3. If you forget, or if you an exact number answer that you want converted to a decimal, just x (times) 1.

Try both to see how they work!

Regards,
George
 
George Jones said:
Put a decimal in one of the numbers, i.e., instead of entering 4 / 3, enter 4. / 3. If you forget, or if you an exact number answer that you want converted to a decimal, just x (times) 1.

Try both to see how they work!

Regards,
George

Cool. Thanks for the alternatives.
 

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