How to Use the BA II Plus

The BA II Plus is a worksheet machine: you store values into named variables and ask the calculator to compute one of them. Once you see that pattern — plus the 2ND modifier — every worksheet works the same way.

Step by step

  1. 1

    Meet 2ND, the gold functions

    Most keys carry a second function printed above them. Press [2ND] once, then the key under the gold label. Press [2ND] again to cancel.

    [2ND][P/Y]

  2. 2

    Store values with number + key

    Type the value, then press the variable key: 360 [N] stores N = 360. Pressing the key without typing recalls the stored value.

    360[N]

  3. 3

    Solve the unknown with CPT

    After storing four of the five TVM values, press [CPT] and the fifth key to compute it.

    [CPT][PMT]

  4. 4

    Enter worksheets with ↑/↓ + ENTER

    2ND functions like P/Y, AMORT or BOND open a worksheet. Move between its variables with ↑/↓, store with ENTER, leave with [2ND] [QUIT].

    [2ND][P/Y]12[ENTER][2ND][QUIT]

  5. 5

    Set the display format once

    2ND FORMAT (the decimal key) sets how many decimals you SEE (0–9). The engine always keeps full precision internally.

    [2ND][FORMAT]9[ENTER][2ND][QUIT]

  6. 6

    Use the memory registers

    Store the display with [STO] 0–9 and bring it back with [RCL] 0–9 — handy for parking an intermediate result.

    [STO]1

Worked example (T1): a 30-year mortgage

N = 360, I/Y = 6, PV = 100,000, FV = 0, P/Y = C/Y = 12. The payment solves to −599.55 (negative because it leaves your pocket). Press the keys below on the simulator.

[2ND][CLR TVM][2ND][P/Y]12[ENTER][↓]12[ENTER][2ND][QUIT]360[N]6[I/Y]100000[PV]0[FV][CPT][PMT]

Web practice cannot replace the physical calculator in a proctored exam — only calculators on the exam organizer’s current list are allowed.

Frequently asked questions

Is Keysheet identical to the real calculator?

+

The key LOGIC and worksheet behavior are faithfully reproduced and unit-tested against verified answers; the visual design is deliberately our own. Only the physical calculator is allowed in exams.

What is Error 5?

+

The machine code for “no solution” — most often from IRR without a sign change, or an unsolvable TVM setup. CE/C clears it; the Error 5 guide walks the checks.

Where is the equals key for math?

+

Standard arithmetic uses [+] [−] [×] [÷] and [=] at the bottom of the pad; chain operations evaluate left to right as you press the next operator.

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