Texas Instruments TI-15 Teachers Manual page 79

Fractions
Notes (continued)
Dividing a fraction by a fraction
gives fractional results regardless of
the division setting (decimal or
fraction).
The ¢ mode settings provide 4
possible display options for
computational results displayed in
fraction form. For example, for
6 ÷ 4, the displays would look like
this:
manual simp/improper (n/d):
auto simp/improper (n/d):
manual simp/mixed number:
auto simp/mixed number:
You can enter the denominator or
numerator first.
For operations, you can enter 1 to
1000 for the denominator. For
conversions to decimal, you can
enter 1 to 100,000,000 for the
denominator.
© 2000 T I
EXAS NSTRUMENTS
6
4
3
2
2
1
4
(U n/d)
1
1
2
(U n/d)
I
NCORPORATED
When you multiply or divide
fractions and decimals, the result
is displayed as a decimal. A
decimal cannot be converted to a
fraction if the result would overflow
the display.
Clearing with w in fractions
occurs from right bottom to left
top. If you accidentally press ¥
(the denominator key) after
entering the numerator, without
entering a numeral for the
denominator first, using w will not
correct that error. You will need to
clear and begin the entry again.
If the decimal place is set to 0, the
decimal equivalent for a fraction
will not be displayed.
TI-15: A Guide for Teachers
8
72