Sharp EL531TH Scientific Calculator - 273 Functions - LCD Display, Plastic Key, Slide-on Hard Case, Battery Powered, Large Display - 2 Line(s) - 12 Digits - LCD - Battery Powered - AAA - 161 mm x 80 mm x 15 mm - Green, Black - Plastic Features A scientific calculator designed for usage in science, engineering, and mathematics. Great for school or engineers. Two-line display showing equation entered on top line and answer on the bottom line allowing users to check both the equation and answer at the same time. User can amend the equation if needed Powered by 1 x AAA battery. Battery is secured with child-safe lock. Recall previous equations, storing up to 142 characters. 9 values can be stored in calculator, with 8 temporary memories and 1 independent memory. *Normal mode only Calculator is approved by the Board of Studies. Can be used in schools Store up to 273 scientific and statistical functions in calculator Hard cover to protect calculator from scratches and for easy storage. Great for students to store their calculators in their school bags "A portion of the equation is automatically memorised as a constant ( function Plus, Minus, Division, Multiplication) , thus omitting redundant input. E.g. 2 x 5 = 10 pressing = will multiply by 5 again This function is great for instances where you'll need to calculate the same equation with a different variable e.g. stocktake or estimating sales The square root of a number is a value that when multiplied by itself equals the original number. Great for jobs like architects, carpenters and engineers