Converting Decimals & Fractions on TI-89 Titanium

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SUMMARY

The TI-89 Titanium calculator allows users to convert decimals to fractions and vice versa efficiently. To convert a fraction to a decimal, input the fraction and press the diamond key before hitting Enter. Users can adjust the calculator's mode by navigating to Mode, Page 2, and selecting either Exact or Approximate, with the recommendation to use AUTO mode for default fractional answers. Additionally, appending a period after a fraction automatically converts it to a decimal format.

PREREQUISITES
  • Familiarity with TI-89 Titanium calculator functions
  • Understanding of mathematical expressions involving fractions and decimals
  • Knowledge of calculator modes (Exact vs. Approximate)
  • Basic operation of the diamond key on the TI-89 Titanium
NEXT STEPS
  • Explore advanced features of the TI-89 Titanium calculator
  • Learn about other modes and settings on the TI-89 Titanium
  • Research mathematical functions and their representations on calculators
  • Practice converting complex fractions and decimals using the TI-89 Titanium
USEFUL FOR

Students, educators, and anyone using the TI-89 Titanium calculator for mathematical computations, particularly those needing to convert between decimals and fractions efficiently.

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Just got a new TI-89 Titanium, can't really figure it out yet, I need help changing decimals to fractions, and fractions to decimals fast. Any ideas?
 
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To convert a fraction to a decimal, type it out first, and before pressing Enter, press the diamond key to tell the TI to report the solution as a decimal. This works for all expressions that are expressed as fractions (exact answers).

To change the mode, go to Mode, Page 2, under Exact/Approx., change the value to Exact or Approximate, depending if you want decimals versus fractions all the time. I recommend leaving it on AUTO mode so that you get exact (fractional) answers by default unless you press the diamond key before entering the expression.
 
Or, if you want to make life easy, just type a period after a number in the fraction, and it will print out as a decimal.

For example, "4/3" is printed as "4/3", but "4/3." is printed as "1.33333"
 

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