Casio are the UK's number 1 scientific calculator brand. fx-83GTX contains 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 shows mathematical expressions like roots and fractions as they appear in your textbooks which increases comprehension because results are easier to understand. This upgraded version of the GTX includes 276 functions. New functions on the GTX model include ratio, digit separator, advanced statistics, advanced tables and variables list and more. Battery powered.