- Simplified Procedure
- Original (light) Procedure
- PDF download of this original version
- Detailed Explanation (download a PDF file)
- Subtraction Without Borrowing (my article)
This blog is dedicated to promoting math knowledge and understanding. We present situations, anecdotes, jokes, photos, videos and anything else that will make you smile, laugh, think and enjoy things mathematical. Someone famous in mathematical circles (who we shall not name) said that you, an ordinary non-mathematician person, cannot enjoy math the way a non-musician can and does enjoy music. We are here to prove him wrong.
A few observations:
Does the inclusion of the decimal point add any more information? Does it serve any purpose? What did the people who placed the decimal points with the fractions tried to accomplish? Or is it the result of lack of understanding of how to express numerical values? (I did not ask any station attendant about their signs.)I am not questioning the presence of the 9/10 fractions because having them is a well-established practice in retail-gasoline pricing.
Question. Has anyone seen similar mixing of decimal fractions with ordinary fraction anywhere other than on gas-stations' price signs?