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Unit 6, 1000 North Circular Road, London NW2 7JD, U.K. Contents Handling Precautions … 2 Modes … 3 Basic Calculations … 5 Constant Calculations … 6 Memory Calculations … 7 Fraction Calculations … 9 Percentage Calculations … 10 Scientific Function Calculations … 11 Statistical Calculations (SD Mode) … 18 Technical Information … 21 — 1 — Handling Precautions •Your calculator is made up of precision components. Never try to take it apart. •Avoid dropping your calculator and otherwise subjecting it to strong impact. • Do not store the calculator or leave it in areas exposed to high temperature or humidity, or large amounts of dust. When exposed to low temperatures, the calculator may require more time to display results and may even fail to operate. Correct operation will resume once the calculator is brought back to normal temperature. • The display will go blank and keys will not operate during calculations. When you are operating the keyboard, be sure to watch the display to make sure that all your key operations are being performed correctly. •Never leave the dead battery (fx-85B/fx-280) in the battery compartment. It can leak and damage the unit. •Avoid using volatile liquids such as thinner or benzine to clean the unit. Wipe it with a soft cloth, or with a cloth that has been dipped in a solution of water and a neutral detergent and wring out. •In no event will the manufacturer and its suppliers be liable to you or any other person for any damages, expenses, lost profits, lost savings, or any other damages arising out of malfunction, repairs, or battery replacement (fx-85B/fx280), or insufficient light. The user should prepare physical records of data to protect against such data loss. •Never dispose of battery (fx-85B/fx-280), the liquid crystal panel, or other components by burning them. •Before assuming malfunction of the unit, be sure to care— 2 — fully reread this manual and ensure that the problem is not due to low battery power (fx-85B/fx-280) or operational error. • The contents of this manual are subject to change without notice. •No part of this manual may be reproduced in any form without the express wr itten consent of the manufacturer. •Keep this manual on hand for future reference. Modes Application Key Operation Mode Name* Standard deviation calculations Fl SD Normal calculations F0 COMP Calculations using degrees F4 DEG Calculations using radians F5 RAD Calculations using grads F6 GRA Number of decimal place specification F7 FIX Number of significant digit specification F8 SCI Cancels FIX and SCI settings F9 NORM *Display indicators show current mode setting. Absence of display indicator indicates COMP Mode. — 3 — Note! •A mode guide is located at the top of the display screen. • DEG, RAD, and GRA modes can be used in combination with COMP and SD modes. • F9 does n...

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