Fractions - Texas Instruments TI-15 Explorer Owner's Manual

5. Fractions

a.  displays a menu from which

the way a fraction is shown is set
- Un/d displays a mixed number and
- n/d displays a single fraction (improper fraction) result.

and whether any given fraction is unsimplified (Man) with
top, or in simplest terms with Auto

This lets you select to display fraction results as mixed numbers or improper
fractions.

Press the left and right arrow keys  and to move the underline. To select
mixed numbers, underline U n/d and press . To select improper fractions,
underline n/d and press .

Press the down arrow

This lets you select to manually simplify fractions (using the  key), or have the
calculator automatically simplify fractions.

Press  and to move the underline.

Press  to exit the Fraction Menu.
b. A mixed number is entered using the  button after the whole number part,
 after the numerator and after the denominator, followed by , or the next part
of a calculation.
c.  changes a mixed number to an improper fraction and vice versa.
d. When the calculator is in Auto mode, and
the fraction to lowest terms in one step.
e. When the calculator is in Man mode, and

pressing  simplifies the fraction to lowest terms in steps where the factor or
divisor to be used can either be entered by the user or the calculator chooses the
factor.

Pressing shows the factor that was used, and pressing it again displays the
simplified fraction. This is repeated until the

The calculator uses the lowest prime number available as a factor first, then moves
to the next prime factor until the fraction is fully simplified.
f. For calculations, the denominator can be from 1 to 1000. For conversions to decimals,
the denominator can be from 1 to 100,000,000.

. The selection MAN AUTO is displayed.
N
D
N
D
9
N
D
n

is visible, pressing  simplifies
d
n

is visible,
d
N n

is no longer on the screen.
D d
n

showing at the
d