hp40g+.book Page 20 Friday, December 9, 2005 1:03 AM

Example

Long results

Negative numbers

Scientific notation (powers of 10)

Example

Calculate 232 – 14 8 ( ) :

--------------------------- ln 45 –3

23

14

8

3 45

If the result is too long to fit on the display line, or if you want to see an expression in textbook format, press

to highlight it and then press .

Type to start a negative number or to insert a negative sign.

To raise a negative number to a power, enclose it in parentheses. For example, (–5)2= 25, whereas –52= –25.

A number like 5 ⋅ 104 or 3.21 ⋅ 10–7is written in scientific notation, that is, in terms of powers of ten. This is simpler to work with than 50000 or 0.000000321. To enter numbers like these, use EEX. (This is easier than

using 10 .)

(4 ⋅ 10–13)(6 ⋅ 1023) Calculate ----------------------------------------------------

3 ⋅ 10–5

4 EEX

13

6 EEX

23 3 EEX

5

Explicit and implicit multiplication

Implied multiplication takes place when two operands appear with no operator in between. If you enter AB, for example, the result is A*B.

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Getting started