Q: Does the manual show how to store constants like the speed of light?
A: Yes. Page 15 covers the 40 built-in constants. Press CONST (orange key above 7) then select from the list. The manual gives the SI values.
Q: Where is the manual’s index for matrix operations?
A: There are no matrix operations. The fx-50FH II is not a graphing calculator. If you need matrices, refer to the manual’s "EQN" mode for linear systems.
Q: Can I get a printed replacement manual in Hong Kong?
A: Yes. Go to any major bookstore (Commercial Press, Joint Publishing) with a calculator section, or contact Casio’s distributor in Tsim Sha Tsui. They often provide free PDFs on USB, but printed copies may cost HKD 30.
Q: The manual mentions "SD Mode" but doesn’t clearly explain how to enter data.
A: Actually, it does on page 18. After pressing MODE + 2 (SD), type a number, then press M+ (the DT key). Repeat. To delete an entry, type the number and press SHIFT + M+. This is critical for statistics.
The Casio fx-50FH II user manual is adequate for basic addition, but it fails to highlight the machine's true power: programming, equation solving, and constant recall. By using this guide alongside the official PDF, you turn a plastic shell with buttons into a genuine time-saving machine for the HKDSE or engineering foundation courses.
Keep this article bookmarked. When your friends ask, "How do I program the quadratic formula into this thing?" or "Why does my sigma button show ERROR?", you will have the answer that the original manual never gave you.
Further Reading:
This calculator lets you write 4 programs (max 680 bytes total). The manual (Chapter 8) explains this, but lacks good examples.
Helpful workflow:
Example program for quadratic roots:
?→A:?→B:?→C: (-B+√(B²-4AC))÷(2A)→X◢ (-B-√(B²-4AC))÷(2A)→Y
Then run with MODE 5 → 2 (RUN) → select program.
EXE.Example program (quadratic solver):
? → A : ? → B : ? → C
B² - 4AC → D
(-B + √D) ÷ (2A) ◄
(-B - √D) ÷ (2A)
