The Casio fx-83GTX is the new upgraded version of the Casio fx-83GTPLUS the UK's best selling scientific calculator, containing additional features such as clearer display, clearer menus, faster processor and 14 additional functions. Allowed in every UK exam where a calculator can be used. Recommended and approved for Key Stages 3 & 4 including GCSE, national and higher, junior and leaving. The large natural textbook display natural V.P.A.M. shows mathematical expressions like roots and fractions as they appear in your textbooks which increases comprehension because results are easier to understand.