**Students and Calculators:**

One of the most prevalent problems amongst my students has been the lack of **numeracy. **

Wikipedia defines numeracy as

"*the ability to reason and to apply simple numerical concepts*".

Wikipedia then explains that

"*Substantial aspects of numeracy also include number sense, operation
sense, computation, measurement, geometry, probability and statistics. A
numerically literate person can manage and respond to the mathematical demands of life*".

** See http://en.wikipedia.org/wiki/Numeracy**

In my opinion, excessive reliance on modern calculators prevents the learning of, or degrades existing ability in *number sense, operation sense* and *computation*. Referring again to Wikipedia

**"**Mathematics" is the abstract study of topics encompassing quantity, structure, space, change, and other properties; it has no generally accepted definition**."**

http://en.wikipedia.org/wiki/Mathematics

I understand this as meaning that mathematics is ultimately about understanding our world as it is measured in numbers. Number Theory is a major branch of advanced mathematics.

You may expect me to discourage your use of your calculator, except when it is necessary.

Write down (without using a calculator) the value of

((150)/3) - 1

------------------------------- (= 7).

(20-17) + 4

If you agree you may be numerate.