Education Technology

Solution 13342: Using the Exact() Function on the TI-89 Family, TI-92 Family and Voyage™ 200 Graphing Calculators.

How do I use the exact() function on my TI-89 family, TI-92 family or Voyage 200 graphing calculator?

The proper syntax for the exact() function are listed below.


The exact() function ensures that the calculator uses the Exact mode arithmetic regardless of the Exact/Approx mode setting to return, when possible, the rational-number equivalent of the argument.

Note: tol specifies the tolerance for the conversion; the default is set to 0(zero).

Refer to the examples provided below.

Ex.1 exact(.25) [ENTER]

Ex.2 exact(.333333) [ENTER]

Ex.3 exact(.33333, .001) [ENTER]

Ex.4 exact(3.5x+y) [ENTER]

Ex.5 exact({.2, .33, 4.125}) [ENTER]

For additional instructions, refer to the online guidebook for your calculator.