When you have complicated questions that involve a
few steps it can be quite useful to know how to use the *memory* in your
calculator to store values. If, as you work through a question, you calculate
some *intermediate *values that you want to remember for later, rather
than writing down all the digits on paper, you can use your calculator’s memory
to store the value. Here’s an example question:

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Now, if you carry out the operations in the correct order, then you’ll have to do this question in 3 steps. First you’ll have to evaluate the expression inside the first set of brackets. Secondly you’ll have to evaluate the expression inside the second set of brackets. And last of all you’ll have to multiply those two numbers together. It would be nice to be able to store the value you get when you evaluate the first set of brackets. This would mean you wouldn’t have to write it down on paper to remember it. Here is how you can do that with our two calculators:

Calculate To store this value, press the button. This tells the calculator that we want to store the value. Next, we need to tell the calculator where to store
the value. There are six easy places we can store the value – A, B, C, D, E
and F. In the diagram they are called Next calculate what You should have the 9.984 on your display. To
multiply this by the value we calculated for Press the button, then press the button. By pressing the button, we tell the calculator that we want to use the ‘A’ variable, instead of the function. Your display should now say something like: ‘Ans×A’. Press the ‘=’ button and you’ll get your answer – it should be something like 14.8662 (I’ve rounded to 4 decimal places). |
Calculate To store this value, press the button. This stores the value in the calculator’s memory. Next calculate what You should have 9.984 on your display. We want to
multiply this by the value we worked out for Now press the button to bring back what we stored in the calculator’s memory. The display will now show the value stored in memory: 1.489. Now press the ‘=’ button. You should get 14.8662 on your display (I’ve rounded to four decimal places). |