The cmplete BA II plus Guide

1. The “Copy-Paste” Trick (STO & RCL)

Stop writing intermediate numbers on your scratch paper. It’s slow, and you might transpose a digit. Your calculator has 10 memory slots (numbered 0 through 9) that act like a digital clipboard.

How to Save a Number (Store):

Think of this as Ctrl+C.

1. Type the number you want to save.
2. Press the STO button.
3. Press a digit key (0 through 9) to pick a “slot” to save it in.

Example: You want to save 500 into slot #1.

• Type 500 –> Press STO –> Press 1.
• Done. It’s locked in.

How to Retrieve a Number (Recall):

Think of this as Ctrl+V.

1. Press the RCL button.
2. Press the digit key (0 through 9) where you saved the number.

Example: You need that 500 back.

• Press RCL –> Press 1.
• Boom. 500 appears on your screen.

Deep Cleaning: How to Wipe the Memory Slots

Here is how to scrub them clean:

Option A: The “Spot Clean” (Deleting just one number)

Use this if you want to reuse Slot #1 but keep the data in Slot #2.

• The Trick: Just save a “0” over it.
• Steps: Press 0 –> Press STO –> Press 1.
• Now Slot #1 is empty (zero).

Option B: The “Total Format” (Deleting ALL memory slots)

Use this before an exam to make sure you have a clean slate.

1. Press 2nd –> [MEM] (the 0 key).
   • This opens the Memory viewer.
2. Press 2nd –> [CLR WORK] (bottom left).
   • This nukes all 10 slots at once.
3. Press 2nd –> [QUIT] to get back to normal.