Casio fx-991ES PLUS (Natural V.P.A.M.)
The Casio fx-991ES PLUS is a scientific calculator with 8 digits precision and formula input logic. It has 403 functions, 50 keys, and an LCD (liquid crystal) display. The power source is Solar. The calculator was manufactured in China. Note: Functionally the same as fx-570ES with solar power
Facts at a glance:
| Feature | Value |
|---|---|
| Type | Scientific |
| Functions | 403 |
| Keys | 50 |
| Precision | 8 |
| Logic | Formula |
| Display type | LCD |
| Length | 161mm |
| Width | 80mm |
| Thickness | 12mm |
| Weight | 105g |
| Power Source | Solar |
| Country | China |
| Year introduced | 2007 |
User Manual
You can download the Casio fx-991ES PLUS manual from this external link.
Replacements:
If you have a Casio fx-991ES PLUS that is no longer working, you can consider replacing the calculator with a modern equivalent.
We suggest the following current model as a replacement: