HP 20B Recall Arithmetic, Storing and Recalling with Time Value of Money TVM Keys, Percentages

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Mathematical Calculations

press L2to recall memory 2. Note how the new current value 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 tkey.

Recall Arithmetic

In RPN, typing 12L+2adds 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.

To perform the same operation in Algebraic and Chain modes, press 12+L2=.

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 Lfollowed by the key of the desired TVM variable. Note: pressing L does not calculate the variable; it recalls the current value.

Recalling a Menu Item Value in a Menu

In a menu, you can recall the current value of a menu item. For example, open the Interest Conversion menu (IConv) by pressing :&. With Nom.% displayed, pressing 2*L=recalls the nominal rate. This feature is useful when you need to insert the contents of a menu item into an algebraic operation.

Rounding Numbers

All calculations are performed internally with 15-digit precision and are rounded to 12 digits when returning the results. In certain instances, calculations are performed internally with greater than 15-digit precision.

When displayed, a number is further rounded to the number of digits after the decimal point set by the FIX item in the Mode menu. The default setting is two digits to the right of the decimal point. For more information, refer to the section titled, The Mode Menu: Setting Preferences in Chapter 1.

Note: the FIX setting only affects the display; it does not affect the actual numbers.

Percentages

In Algebraic or Chain modes, pressing %divides a number by 100. For example, pressing 25%returns 0.25.

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Contents HP 20b Business Consultant Financial Calculator Manual HP part number F2219-90201 First edition AugustLegal Notices Revision HistoryLegal Notices Revision HistoryContents Business Problems Time Value of MoneyCash Flows BondsWarranty, Regulatory, and Contact Information ErrorsIndex Feature Feature ChaptersHP 20b Business Consultant Keyboard Keyboard Map LegendBasic Features Adjusting the Display ContrastBasic Features Selecting a LanguageMode Menu Setting Preferences Two Line DisplayBasic Features 1Mode Menu Settings Setting top line DescriptionChanging the Calculation Mode Keys Display DescriptionKey Presses and the Secondary Function Key AnnunciatorsI Key Using the I and = Keys= Key Editing and Clearing Entries On/CE O Key Reset x MenuMemory and the Memory Menu Accessing Menus and Menu Maps Menu Map for the Break-even Menu Mathematical Functions Mathematical CalculationsNumber Entry and Display Chain Mode Algebraic ModeReverse Polish Notation RPN Mode RPN StackU3I Last NumberO1c23 I56c1 3I4+ 5I6+Mathematical Calculations 2Last Number RPN StackKeys Display Description RPN Stack One-Number Functions and the Math Menu RPN Stack and the Roll Down OperationMath s Menu Keys DescriptionMenu Map for the Math Menu Mathematical Calculations 5Math Menu Example Probability Sub-menuIor = Two-Number Functions 10I10I 12I 7Inverse Probability ExampleStoring and Recalling Numbers Recall Arithmetic Storing and Recalling with Time Value of Money TVM KeysRecalling a Menu Item Value in a Menu Rounding NumbersPage Time Value of Money Time Value of Money TVM KeysTime Value of Money 360 N 140000V Calculating Payments on a LoanTime Value of Money 2TVM Example AmortizationMenu Item/Key Description 1400 00V 10YCreating an Amortization Schedule Using the Interest Conversion Menu Interest Conversion Menu365 Canadian Mortgages TVM CanadaTime Value of Money 6Interest Rate Conversion Example Page O300N 6Y350 00V Canadian Mortgage ExampleCash Flow Diagram Cash FlowsKey Description Cash Flow ExampleCash Flow Amount 8000 5000I4500I 4000IAnalyzing Cash Flows 115000Cash Flows 2Cash Flow Example NPV and IRR Menu Items IRR%Editing Cash Flows Cash Flows 4NPV and IRR ExampleSample Cash Flow Diagrams Bonds Bond Menu2010 2020Bond Calculation Example Bond Menu Items+L1= Bonds 2Bond Calculation ExampleDate Calculation Menu Date CalculationDate Calculation Example 10.3 12010 Date Calculation 1Date Calculation ExampleBreak-even Break-even MenuBreak-even 1Break-even Example Business Problems Percent Calculation Menu15I 22I20I 35I80I What is 30% of 80? 4Part % of Total Example30I Depreciation Depreciation Menu2Depreciation Menu Items 1Depreciation MethodsDepreciation Method Description Sline 1000 500Depreciation Example Depreciation Menu ItemsDepreciation 3Straight Line Depreciation Example Statistical Operations Menu Maps for the Data and Statistics MenusData and Stats Menus Statistical Operations 1The Statistics Menu Items Menu Item Description1I1 50I 2I1 65I3I1 60I 4I1 75I5I1 70I Statistical Operations 3Statistics ExampleError Messages and Calculator Status Errors1Error Messages Error Message Status HP Limited Hardware Warranty and Customer Care Warranty, Regulatory, and Contact InformationReplacing the Batteries Customer Care 210 969 Honduras Hong Kong 香港特別行政區 852 India+65 6100 Ireland 01 605 Italia 02 754 19877 232 495 22801 439 Singapore 6100Product Regulatory & Environment Information ModificationsCanadian Notice Avis CanadienChemical Substances Pbde Index Calendar Actual, Cal.360Off calculator off