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Fxsf fx-991ES/EX Calculator

Name: fx-991ES/EX Calculator
Brand: Fxsf
Price: 50500.00 UGX
Availability: InStock

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UGX 50,500

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Pickup Station

Delivery Fees UGX 2,500

Ready for pickup between 13 December and 16 December if you place your order within the next 22hrs 33mins

Door Delivery

Delivery Fees UGX 3,500

Ready for delivery between 13 December and 16 December if you place your order within the next 22hrs 33mins

Return Policy

Free return within 7 days for eligible items.Details

Seller Information

Zigoti Electrical limited

New Seller

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Product details

1. Physical Design & Layout

· Casing: Sleek, compact, with a dark gray or black plastic body.

· Display: A multi-line dot-matrix LCD screen (capable of showing expressions, fractions, and graphs in some models) — shown here displaying a trigonometric expression 3.0 sin(X)α.

· Keypad:

· Primary keys in black with white labels.

· Secondary functions in blue (accessed via SHIFT key).

· Alpha functions in orange/red (accessed via ALPHA key).

· Well-organized into:

· Number pad (0–9, decimal point)

· Arithmetic keys (+, –, ×, ÷, =)

· Trigonometric keys (sin, cos, tan, with inverse functions via SHIFT)

· Calculus keys (∫, d/dx — integration & differentiation)

· Statistical keys (STAT, DISTR, etc.)

· Matrix/vector keys (MAT, VCT)

· Complex number keys (∠, ENG, i)

· Mode & setup keys (MODE, SETUP, SCI/FIX)

· Navigation keys (arrows for menu browsing)

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2. Key Features & Capabilities

· Advanced Math:

· Equation solving (polynomial, simultaneous)

· Calculus (numerical integration & differentiation)

· Matrix/vector calculations

· Complex number arithmetic

· Statistics:

· Regression analysis

· Probability distributions

· Data lists and summaries

· Base-n & Logic: Binary, octal, hexadecimal calculations and logic gates.

· Unit Conversions & Constants: Possibly includes metric/imperial conversions and scientific constants.

· Multi-line Display: Allows viewing of full expressions and previous calculations.

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3. Display & User Interface

· Shows expressions naturally (like typing on paper).

· Supports fraction, square root, and exponent display.

· Angle modes: Degrees, Radians, Gradians.

· Indicators for SHIFT, ALPHA, Battery, and Mode visible on screen edges.

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4. Power & Build

· Likely powered by solar cell with battery backup (common in this class).

· Lightweight — estimated 100–150g.

· Durable plastic construction suitable for school, university, or field use.

Specifications

Key Features

✅ 1. High Functionality at a Low Cost

· Offers similar advanced features as premium brands (Casio, Texas Instruments) but at a more affordable price.

· Ideal for budget-conscious students, schools, or professionals.

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✅ 2. Advanced Mathematical Capabilities

· Calculus-ready: Includes integration (∫) and differentiation (d/dx) — useful for high school and college math/engineering.

· Equation Solver: Can solve polynomials, simultaneous equations, and systems.

· Matrix & Vector Calculations: Supports up to 3x3 matrices, useful for linear algebra.

· Complex Numbers: Full support for complex arithmetic, polar/rectangular forms.

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✅ 3. User-Friendly Multi-Line Display

· Natural Textbook Display (NTD): Shows fractions, exponents, and expressions as they appear in textbooks.

· Multi-line history: Review previous calculations — reduces errors and helps learning.

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✅ 4. Statistical & Data Analysis Tools

· Comprehensive statistical functions: regression analysis (linear, quadratic, etc.), probability distributions (normal, binomial).

· Handles large data sets — useful for lab reports, research, and statistics courses.

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✅ 5. Exam-Friendly & Widely Accepted

· Likely permitted in standardized exams (SAT, AP, GCSE, etc.) where programmability is restricted but advanced calculators are allowed.

· No Bluetooth or CAS (Computer Algebra System) — so it’s often exam-legal.

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✅ 6. Versatile Input & Notation

· Supports DMS (Degrees, Minutes, Seconds) for angles.

· Engineering notation (ENG) and scientific notation.

· Binary, octal, hexadecimal calculations for computer science courses.

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✅ 7. Long Battery Life

· Typically solar-powered with battery backup — reliable for long study sessions or exams.

· Energy-efficient display.

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✅ 8. Compact & Portable

· Lightweight design (≈100–150g) fits easily in a pencil case or bag.

· Durable construction suitable for daily student use.

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✅ 9. Learning & Study Support

· “AUTO” feature may simplify repetitive calculations.

· Helps visualize step-by-step solutions in some modes (like equation solving).

· Great for self-study, homework, and exam prep.

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✅ 10. Multi-Discipline Use

· Suitable for:

· Mathematics (algebra, calculus, statistics)

· Physics & Engineering (complex numbers, vectors, conversions)

· Economics & Business (statistics, regression)

· Computer Science (base-n, logic calculations)

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Specifications

SKU: CI511SN4EX4C3NAFAMZ
Model: fx-991ES/EX
Weight (kg): 200g
Certifications: Eco Friendly
Color: Grey
Main Material: Plastic

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