Review of Introductory Mathematics CALCULATOR OPERATIONSMemory KeyThe TI-30 has only one memory. Pressing the STO key enters the displayednumber into memory. Any number already in memory will be overwritten.Note: Calculators with more than one memory will require a number to be entered withthe STO key. For example, STO 01 means store the displayed number in memory01; STO 20 means store the number in memory 20.Memory Recall KeyPressing the RCL key will retrieve the number in memory and display it. Notethat the number is also still in memory. This allows the number to be used again.Pressing the RCL will also overwrite any number previously displayed.Note: Calculators with more than one memory will require a number to be entered withthe RCL key. RCL 01 means recall the number stored in the 01 memory. RCL20 means recall the number stored in memory 20.Constant KeyCertain calculations often contain repetitive operations and numbers. The K,constant, is a time-saving function that allows a single key stroke to perform asingle operation and number on the displayed number.For example, if 20 numbers are to be multiplied by -17.35, the K key can be used.Enter -17.35, then press the times key, then the K key; this "teaches" thecalculator the required operation. From this point on when entering a number andpressing the K key, the calculator will automatically multiply the displayednumber by -17.35, saving you six key strokes.Summation KeyIf a long list of numbers is to be added, the summation key will save time if used.Pressing the summation key adds the displayed number to the number in memory.The final sum is then retrieved from memory.Memory Exchange KeyThe EXC, memory exchange key, swaps the displayed number with the numberin memory.Reciprocal KeyWhen pressed, it divides the displayed number into one.Rev. 0 Page 5 MA-01

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