HP·38E/38C - Slide Rule Museum
HP·38E/38C - Slide Rule Museum
HP·38E/38C - Slide Rule Museum
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Keying In Exponents of 10<br />
Using Your Calculator 23<br />
If you are dealing with millions, billions or trillions of dollars, you can<br />
save keystrokes (all those zeros') by using the I EEX I (enter exponent of<br />
10) key. For example, to key in IS.6 trillion (1S.6 x 10 12 ) and multiply<br />
it by 2S:<br />
Keystrokes<br />
ICLXI<br />
IS.6<br />
(]] I EEX I<br />
12<br />
IENTERtl<br />
2S0<br />
Display<br />
0.00<br />
15.6<br />
15.6 00<br />
15.6 12<br />
1.560000 13<br />
3.900000 14<br />
This means IS.6 x 10 12 .<br />
Displayed in scientific<br />
notation.<br />
The answer.<br />
This is the same as 390 trillion. (Move the decimal point 14 places to<br />
the ri ght.)<br />
Example: The estimated world aggregate of gross national product<br />
in 1971 was $3,SOO,000,000,000. If the 1971 GNP of the United States<br />
was $1, lSI ,800,000,000, what was the GNP for the rest of the world?<br />
Keystrokes Display<br />
3.S (]] I EEX I 3.5 00<br />
12 3.5 12<br />
I ENTERtl 3.500000 12 (3.S x 10 12 ).<br />
I.1S1 8 (]] I EEX I 1.1518 00<br />
12 1.1518 12 (1.1S18 x 10 12 ) .<br />
G 2.348200 12<br />
The GNP for the rest of the world was $2,348,200,000 ,000.<br />
(Refer to Your HP Financial Calculator, The Display and Memory,<br />
for more information on sc ientific notation display.)
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