User manual CASIO FX-270W PLUS

[. . . ] --2-- · Before assuming malfunction of the unit, be sure to carefully reread this manual and ensure that the problem is not due to low battery power 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 written consent of the manufacturer. · Keep this manual on hand for future reference. Modes Application Standard deviation calculations Normal calculations Calculations using degrees Calculations using radians Calculations using grads Number of decimal place specification Number of significant digit specification Cancels FIX and SCI settings Key Operation Mode Name* SD COMP DEG RAD GRA FIX SCI NORM Fl F0 F4 F5 F6 F7 F8 F9 * Display indicators show current mode setting. [. . . ] · Example 1: (53 6) (23 8) (56 2) (99Ö4) 210. 75 (53 6) (23 8) (56 2) (99 4) (Memory recall) 53 + 6 = Y 23 , 8 | 56 - 2 | 99 \ 4 | M M M M M 59. 24. 75 210. 75 Z · Example 2: To calculate the following using memory as shown. M 13. --7-- · Example 3: To calculate the following using memory and a constant: (12 3) (45 3) (78 3) 135. (12 3) (45 3) (78 3) (Memory recall) 3 - - 12 = Y 45 A { 78 | MK MK MK MK 36. 135. Z Fraction Calculations · Use COMP mode for fraction calculations. · Total number of digits (including division marks) cannot exceed 10. · Example 2: 3 1 4 1 2 11 4 3 12 3C1C4+ 1C2C3= · Example 3: 2 4 1 2 2 C4 4 11 12. 1 2. = --8-- · Example 4: 1 2 1. 6 2. 1 1 C 2 + 1. 6 = 2. 1 Fraction/decimal calculation result is always decimal. 1 2 3. AB AB --9-- Percentage Calculations · Use COMP mode for percentage calculations. 1500 - 12 A v 180. · Example 2: To calculate what percentage of 880 is 660. 3500 - 25 A v , 75. 2875. 2625. · Example 5: To calculate the following, using a constant. 12% of 1200 = 144 18% of 1200 = 216 23% of 1200 = 276 (12%) (18%) (23%) 1200 - - 12 A v 18 A v 23 A v -- 10 -- K K K 144. 276. Scientific Function Calculations · Use COMP mode for scientific function calculations. When an illegal mathematical operation (such as division by zero) is performed. ("­E­" indicator appears on display. ) -- 23 -- e. The total number of nested parentheses levels exceeds six, or when more than 18 pairs of parentheses are used. ("­ 1­" indicator appears on the display. ) · To clear any of the above conditions, press t and perform the calculation from the beginning. This clears the intermediate result just prior to the overflow, so you can continue with the calculation from that point. · No error occurs when the result is within the range of (1 10 99) to (1 10 99). Instead, the display shows all zeros. kPower Supply This calculator is powered by two AA-size manganese dry batteries (R6P (SUM-3) or UM-3). Replace batteries as soon as possible when display characters become dim and difficult to read. · Power automatically turns off (but data in memory is retained) if no key operation is performed for about six minutes. Important! Incorrect use of batteries can cause them to burst or leak, possible damaging the calculator. · Be sure to replace the batteries at least once every two years, regardless of how much the calculator is used. Old batteries may leak, causing serious damage to the interior of the calculator. [. . . ] Install two new batteries with the positive ( ) and negative ( ) ends facing correctly. -- 25 -- Screws Batteries Screws kOrder of Operations and Levels Operations are performed in the following order of precedence. , · Operations with the same precedence are performed from left to right, with operations enclosed in parentheses performed first. If parentheses are nested, the operaitons enclosed in the innermost set of parentheses are performed first. [. . . ]