Question

how to do operation on real numbers??

Answer 1

This tutorial reviews the adding, subtracting, multiplying, and dividing of real numbers as well as using exponents and roots. Once we have that all down, we will put it all together using the order of operations.   I have the utmost confidence that you are familiar with these operations, but sometimes the rules for negative numbers (yuck!) get a little mixed up from time to time.  So, it is good to go over them to make sure you have them down.  This is a very good topic to have down, because real numbers are EVERYWHERE. 

Even in this day and age of calculators, it is very important to know these basic rules of operations on real numbers.  Even if you are using a calculator, you are the one that is putting the information into it, so you need to know things like when you are subtracting versus multiplying and the order that you need to put it in.  Also, if you are using a calculator you should have a rough idea as to what the answer should be. You never know, you may hit a wrong key and get a wrong answer (it happens to the best of us).  Also, your batteries in your calculator may run out and you may have to do a problem by hand (scary!!!).   You want to be prepared for those Murphy's Law moments. 

Answer 2

After completing this tutorial, you should be able to: Add and subtract real numbers. Multiply and divide real numbers. Evaluate a numeric exponential expression. Evaluate a numeric radical expression. Use the order of operations appropriately


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