The casio fx 85gt plus is the solar powered version of the fx 83gt which is the uks best selling scientific calculator it is allowed in every uk exam where use of a calculator is permitted suitable for use from ks 34 and above recommended for gcse aas lavel standard and higher studies the large natural textbook display shows mathematical expressions like roots and fractions as they appear in your textbook which increases comprehensionnatural vpam textbook display displays as wri