Calculator - scientific, both solar and battery powered power, dot display, trigonometric functions, fractions, logarithm, square roots, percentage calculation, with protective case Do you want to make sure your calculations are correct? You'll need the CASIO FX 991 ES PLUS 2E calculator. The Scientific calculator easily performs more complex calculations, which makes it a great choice for students of secondary schools and universities. It has 417 functions, that cover all types of mathematics in the standard curriculum. The calculator's basic functions include with square roots, with percentages, with brackets, last responce and recovery. The CASIO FX 991 ES PLUS 2E will also solve derivatives and integrals, logarithmic functions, or trigonometric functions. The advantage of this variant, is that it has both a solar panel and battery, which saves power. It uses dot display technology. Its packaging includes a protective case that will keep it from getting...