Casio fx-991ES PLUS 2nd Edition Scientific Calculator

New functions:

• New equation mode
• Random integers

Standard functions:

• Fraction calculations
• Combination and permutation
• Statistics (List-based STAT data editor, standard deviation, regression analysis)
• 9 variables
• Table function
• Comes with new slide-on hard case

• Number of Functions : 417
• With Natural Textbook Display
• Digits: 10 + 2 digits (10-digit mantissa + 2-digit exponential display)
• Dot Matrix Display
• Multi-replay
• Solar & Battery