Casio FX-991ES User Guide - Page 27

Using Calculator Memory Memory Name Description Answer Memory Stores the last calculation result obtained. Independent Memory Calculation results can be added to or subtracted from independent memory. The "M" display indicator indicates data in independent memory. Variables Six variables named A, B, C, D, X, and Y can be used for storage of individual values. This section uses the COMP Mode (N1) to demonstrate how you can use memory. k Answer Memory (Ans) Answer Memory Overview • Answer Memory contents are updated whenever you execute a calculation using any one of the following keys: =, 1=, m, 1m(M -), t, 1t(STO). Answer Memory can hold up to 15 digits. • Answer Memory contents are not change if an error occurs during the current calculation. • Answer Memory contents are maintained even if you press the A key, change the calculation mode, or turn off the calculator. • If a CMPLX Mode calculation produces a complex number result, both the real part and imaginary part are stored in Answer Memory. In this case, however, the imaginary part will be cleared from Answer Memory if you change to another calculation mode. Using Answer Memory to Perform a Series of Calculations Example: To divide the result of 3 × 4 by 30 LINE 3*4= (Continuing)/30= Pressing / automatically inputs "Ans" command. • With the above procedure, you need to perform the second calculation immediately after the first one. If you need to recall Answer Memory contents after pressing A, press the G key. E-25