Texas Instruments TI-60 - Page 15

chapter 1-1
KEYBOARD AND DISPLAY BASICS
Integer Rounding
Because a problem Is solved as a sequence ol steps, a calculation that
should produce an Integer result may produce a 13-digit, fractional result
To prevent this situation, ttie calculator uses the Internal guard digits »o
determine how to display the result
It Ihe fractional part of the 13-digH result is greater than 0 9999999994 the
calculator automatically rounds the number to the next Integer value
For example, consider the following problem
1 + 3x3-7
internally. Ihe calculator solves the problem in two steps, as shown below
1 + 3 - 0 3333333333333 Then
0 3333333333333 x 3 - 0 9999999999999
Most calculations are accurate to within * 1 In the last displayed digit The
higher-order mathematical functions use Ueratrve calculations In most
cases, the cumulative error from these calculations is maintained beyond
the 10-drglt display so that no inaccuracy is shown.
Automatic Power Down (APD ™ )
To conserve power after 15 to 35 minutes ot nonuse the calculator is
automatically powered down through the APD ™ feature However. |ust
turning It back on allows you to continue in the same state the calculator
was In and use the values in the user data memories, statistics registers,
and any stored program Any pending operations and intermediate values
are lost. The effect Is Ihe same as it you had pressed Ihe OFF key
7 GB