DUPOTA OA-991ES PLUS Scientific Calculator 417 Functions, Support Fraction and Decimal Point Conversion 10+2 Digits Written Display, Solar Battery - Ideal for Secondary School Students Teachers

【417 Computing Functions】The scientific calculator with 417 functions for Include exponents, matrix calculations, statistics, integral, algebra, complex number calculations, standard deviation,etc.Apply to school, office or business, and more. Its practicability could meet the needs of various digital fields, and ideal for students. 【Dual-line Display Science Calculator】Featuring a 12-digit widescreen HD LCD, this scientific calculators shows input and results together, minimizing errors. Ideal for offices and teaching, it offers clear formula display for precise math calculations. 【Conversion of Fraction and Decimal】The fraction and decimal conversion keys on the scientific calculators are very useful, and you have the flexibility to select your desired mode by pressing the ‘S-D’ buttons, making it convenient to handle exact values ​​in calculations. 【Answer Memory & Replay Function】Scientific Calculator can memorize the answers of previous calculations and replay them for viewing at any time, easily checking and modifying complex calculations, reducing the time spent on manual record keeping and repetitive inputs, helping you to complete your homework and exams more efficiently, and saving time in studying and taking exams. 【Dual Power】This school calculator has dual power sources, solar and battery, for double security. Solar power ensures that it can still be used normally when the batteries run out. You don't have to worry about the calculator suddenly running out of power during critical exams or homework, and with greater peace of mind.