Casio fx-991 (SCIENTIFIC CALCULATOR)
The Casio fx-991 is a scientific calculator with 8 digits precision and algebraic logic. It has 38 keys, and an LCD (liquid crystal) display. The power source is Solar.
Facts at a glance:
| Feature | Value |
|---|---|
| Type | Scientific |
| Keys | 38 |
| Precision | 8 |
| Logic | Algebraic |
| Display type | LCD |
| Length | 140mm |
| Width | 73mm |
| Thickness | 9mm |
| Weight | 59g |
| Power Source | Solar |
| Year introduced | 1985 |
| Year discontinued | 1989 |
Replacements:
If you have a Casio fx-991 that is no longer working, you can consider replacing the calculator with a modern equivalent.
We suggest the following current model as a replacement: