Texas Instruments
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$65.99
Scientific Calculator 552 Functions, 2-Line Written Display Solar Battery Calculators, Support Fraction and Decimal Point Conversion - Ideal for Middle High School Students and Teachers 991EX PLUS
★★★★★
$65.99
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About this item
- 【552 Advanced Scientific Functions】A versatile scientific calculator designed for advanced mathematics, covering everything from statistics and standard deviation to complex 4x4 matrix calculations, vectors, and calculus. It is the ultimate tool for high school students, college students, and engineering professionals
- 【High-Resolution Natural Textbook Display】The 991EX scientific calculator features a high-resolution multi-line display that supports Natural Textbook Display technology. It shows mathematical formulas, fractions, and symbols exactly as they appear in textbooks, allowing you to view calculation processes and results simultaneously with ease
- 【High-Efficiency Computing & Spreadsheet Mode】Equipped with an advanced high-speed processor for rapid solving of high-order equations and large data sets. This advanced calculator includes an integrated spreadsheet mode and supports matrix calculation and vector operations, significantly boosting productivity in STEM fields and lab work
- 【Reliable Dual Power & Rugged Durability】This solar powered calculator features a dual power system (Solar + Button Battery) for uninterrupted performance during critical exams. It includes an intelligent 8-minute auto shutdown feature to save energy and a protective sliding back cover that is pressure-resistant and durable for high-intensity daily use
- 【Ultra-Lightweight & Ergonomic Portability】Weighing only 125g, this portable scientific calculator is sleek and easy to carry. The clear, non-slip button layout and dedicated "CHG" function key allow for instant fraction to decimal conversion, simplifying complex values and making it a reliable partner for precise calculations anywhere
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What customers say about Bigamart
10 Trustpilot reviews total, with 2 shown at a time.
Trustpilot
★★★★★
Excellent
4.5 average rating
S
Sigalit
🇮🇱 · January 2026
★★★★★
I wrote to Bigamart's customer support and they accompanied the process of reshipping the item until it finally arrived. I felt a genuine effort to solve the problem till it was finally solved.
V
Verified buyer
🇦🇺 · November 2025
★★★★★
The package was here in Australia from England in a few days — so quick! Something was missing and they refunded it straight away. Pretty happy with these guys.
Showing 1–2 of 10 reviews
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