Casio fx-991CW– Advanced Scientific Calculator with High-Res 4-Tone Display | Natural Textbook Display | 540+ Functions, Numeric Calculus, Matrix Solver | Ideal for Engineering, Science & Exams

A high performance scientific calculator with high resolution display increasing the amount of information displayed and super fast calculation speed for testing or performing the most advance mathematics. High resolution LCD screen allows viewing of more information like spreadsheets and 4x4 matrix calculations. This calculator has a comprehensive set of advanced calculations for integration & differential calculus, along with vector and inequality calculations. For middle school, high school and college math courses.

• NATURAL TEXTBOOK DISPLAY – View equations, fractions, and symbols exactly as they appear in textbooks for better comprehension and reduced errors.
• HIGH-RESOLUTION 4-TONE DISPLAY – Enhanced screen with quad-tone shading improves visibility and makes cursor tracking easy when writing and editing expressions.
• MEMORY & MATH CATALOG – Store and recall up to 9 variables containing integers, computations, and functions. Memory persists between sessions—an educator-requested feature. Access 47 constants, 40 conversions, advanced math functions, and more through the intuitive Math Catalog.
• 540 ADVANCED FUNCTIONS – Perform numeric integration and differentiation, 4x4 matrix operations, spreadsheet-style data viewing, and more.
• QR FUNCTIONALITY & DURABLE DESIGN – Scan QR codes to graph results on ClassPad.net; includes rounded keys and a non-slip hard case for classroom or exam use.