Yes, except when calculating the simplest operations they use approximation methods that only produce "good enough" answers not right answers. Also irrational, most rational, and numbers needing higher precision than the calculator has will have rounding errors.
There are many other sources of error in calculator results and understanding their sources will help avoid getting meaningless results, but many calculator manuals do not cover these issues (a full understanding often requires knowledge of some very difficult mathematical theory).
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The disadvantages of calculators is that they are no longer practical or convenient. Unless scientific in nature, most people use the calculators on their smart phones and wireless devices. While stand alone calculators are still in use, their popularity has immensely decreased across the nation.
Calculators are used to calculate, or solve math problems to come up with solutions.Hope that helped!
One eighth times 5 is 40, because there are 40 eighths in 5.Other people may think that it will be something like .625 or 6.25, but they are wrong because they probably did it on a calculator, and calculators usually interpret things in the wrong way.
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Graphing calculators have the ability to see a visual representation of graphs and equations. Scientific calculators have less features and can only perform numerical mathematical equations. Graphing calculators cost around $90 while scientific calculators can be found for under $10.