# Tag Info

## Hot answers tagged calculators

### What are some simple problems that calculators get wrong?

The first sentence of the question is "A frequent issue with students is their uncritical over-reliance on computation devices," hence my answer is in the spirit of presenting something ...
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### What are some simple problems that calculators get wrong?

The last time I taught introductory numerical analysis, my first slide was this print from excel: If you want another example: These calculations are clearly easy and wrong, as required. Remark 1: ...
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### Loaning students calculators during exams

To summarize what I arrived at, based on the top answer on my prior parallel question on SE Academia, OP's #2 is the way to go -- keep a small supply of calculators on hand, but assess a usage penalty ...
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### What are some simple problems that calculators get wrong?

Ask a TI-89 to evaluate $\sin(n \pi)$ for different integers $n$, and you'll start out fine (when $n = 0, 1, 2, 3$), but starting with $n = 4$, you'll get values like $-2 E -13$. Or there's $8^{8^8}$ ...
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### What are some simple problems that calculators get wrong?

In a rather different vein, calculators can be correct in a numerical sense but miss an optimal solution method. In this answer two such cases are described, and I refer the reader to the above link ...
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