HP 20b Business Consultant Financial Calculator User Manual Page 32
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Mathematical Calculations24
Storing and Recalling Numbers
The calculator has ten memories available for use during calculations. These memories are
numbered from 1–9 and 0. To store a number in a memory, press :$, followed by
the key representing the memory number. To recall a number stored in a memory, press L
followed by the key representing the memory number. You can use the store and recall
functions for these memories any time a number is displayed, or when you wish to enter a
number.
For example, to store 15 in memory 1, press 15:$1.
To recall the number in memory 1, press
L1.
You can also perform operations to numbers stored in memories. For example, press
5:$2 to store 5 in memory 2. To add 12 to the value of memory 2, press
12:$+2. Later on, during a calculation, you can press L2
to recall memory 2. Note how the current value now stored in memory 2 is 17, (5 +12).
+-* and / are valid mathematical operations for memories.
To view the stored values in memories 1–9 and 0, press :t, followed by <
or > repeatedly to scroll through each memory starting with memory 1 (Mem 1). Note
that in the Memory menu, you can change the value of any memory by selecting the memory
and typing a number followed by the t key.
Recall Arithmetic
In RPN, typing L+2 adds the value of memory 2 to the first level of the stack, but
it will not modify the stored value of memory 2. This is useful, as it "saves" one stack level.
You can also use -* and / after L.
Storing and Recalling with Time Value of Money (TVM) Keys
To store the current number in the Time Value of Money (TVM) variables, press :$
followed by the desired TVM key.
To recall the stored value of a TVM variable, press
L followed by the key of the desired
TVM variable.
Note: pressing
L does not calculate the variable; it recalls the current value.
- HP 20b Business Consultant 1
- HP 30b Business Professional 1
- Legal Notice 2
- Keyboard Map Legend 5
- Table of Contents 7
- Selecting a Language 9
- Two Line Display 10
- until the 11
- <<< 12
- << 12
- Basic Features 13
- Annunciators 14
- The Input Key 14
- The Equals Key 14
- Editing and Clearing Entries 15
- The On/CE Key 15
- The Reset Menu 15
- Notes about Special Menus 16
- Memory and the Memory Menu 16
- Accessing Menus and Menu Maps 16
- or > 17
- returns 17
- with that 17
- Basic Features10 18
- Mathematical Functions 19
- Number Entry and Display 19
- Chain Mode 20
- Algebraic Mode 20
- I or = are valid 21
- I, this 22
- + changes the 22
- <<<< 23
- Mathematical Calculations 25
- Mathematical Calculations18 26
- Random number 27
- The Math Menu 27
- I on any of these items to 28
- The Probability Sub-menu 29
- Binomial Functions 31
- Two-Number Functions 31
- Storing and Recalling Numbers 32
- Recall Arithmetic 32
- returns 0.25 33
- % to add or subtract x % 34
- - returns 150, or 200-25% 34
- 3 Time Value of Money 35
- :x. Press < or > 37
- A. The Amortization 37
- V, M and [ 37
- A followed by < or 38
- I to reset, or O to cancel 40
- :& 41
- O once again 42
- Canadian Mortgage Example 44
- as 1 is the default 45
- Cash Flow Example 46
- P and IRR R 49
- Cash Flows42 50
- Editing Cash Flows 52
- Sample Cash Flow Diagrams 54
- = to calculate it 56
- Bond Calculation Example 57
- O again to exit the menu 58
- :(HOLD)B 59
- The Black-Scholes Menu 60
- (the Black-Sholes key) 60
- = in the 61
- to scroll through the menu 62
- :(HOLD) B 63
- to scroll to the 64
- 8 Date Calculation 65
- 9Break-even 67
- The Percent Calculation Menu 69
- repeatedly to scroll to the 69
- Percent Calculation Examples 70
- to reset the menu, or O to 72
- 11 D e p r e c i a t i o n 73
- The Depreciation Menu 74
- Depreciation Example 75
- 12 Statistical Operations 77
- The Data and Stats Menus 78
- Statistics Example 80
- :z<< 82
- 13 Programming 83
- : and simultaneously 83
- : >or< 84
- Programming Example 85
- Program Step 0 86
- : and the < 87
- Programming80 88
- Figure 2 88
- (HOLD) 89
- Sub-Function Call 90
- and (HOLD) functions 90
- .05003:$1 91
- Messages 92
- (HOLD) . If you want to 93
- Programming86 94
- Table 13-4 94
- Digit Description 94
- Programming88 96
- 14 E rro r M e s s a g e s 97
- Replacing the Batteries 99
- Regulatory Information 100
- Modifications 101
- Canadian Notice 101
- Avis Canadien 101
- Japanese Notice 102
- Korean Notice 102
- Contact Information 103
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