HP 33S - Page 6

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HP 33S Working with Fractions
If flag 8 is set, then the numerator must be exactly “c”, but the fraction can be simplified. If flag 8 is set and flag 9 is set
too, then the numerator must be exactly “c”, and there is no simplification.
Example 7: Display the fraction 179/3000 using the different flag settings combined with Ê.
Solution: This example will be shown in RPN mode. The same steps work in algebraic mode, but that ¹Í is
needed after each step when a flag is changed, as in example 3 above. First enter the fraction, and make
sure Ê is set to 4095, which is its usual value.
179ËË3000Ï0ºÊ
Figure 10
179/3000 is displayed.
Now store 99 in Ê. This means that all fractions must be displayed with only one or two digits in the
denominator.
99ºÊ
Figure 11
The fraction is displayed with only two digits in the denominator, and it is rounded to the nearest possible
fraction to 179/3000.
Now display the number with 99 as the denominator. To do this, set flag 8. First, select the flag menu:
º·
Figure 12
This brings up the flags menu. Press 1 to select the SF (Set Flag) command. Then press 8 to select
flag 8.
18
Figure 13
hp calculators - 6 - HP 33S Working with Fractions - Version 1.0