HP 10bII+ - Page 59

Number Storage and Storage Register Arithmetic
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Example 4
Calculate the percent change between 55 and 32 and store it as a constant. Then calculate
the percent change between 50 and 32, and 45 and 32.
All of the other two-number functions on the calculator may be used with ª in the same
manner as shown in example 4. For a complete list of two-number functions, refer to the
section titled, Two-Number Functions in chapter 2.
Using the M Register
The s, p, and m keys perform memory operations on a single storage register,
called the M register. In most cases, it is unnecessary to clear the M register, since s
replaces the previous contents. However, you can clear the M register by pressing :s.
To add a series of numbers to the M register, use s to store the first number and m to
add subsequent numbers. To subtract the displayed number from the number in the M register,
press y followed by m.
Table 4-4 Calculating percent change
Keys Display Description
VV\¨DGª
32.00 Stores % change 32 as constant.
4
-41.82 Calculates the % change
between 55 and 32.
V:4
-36.00 Calculates the % change
between 50 and 32.
YV4
-28.89 Calculates the % change
between 45 and 32.
Table 4-5 Keys for performing memory operations
Keys Description
s
Stores displayed number in the M register.
p
Recalls number from the M register.
m
Adds displayed number to the M register.