Thursday, March 30, 2017

                               The numbers DO add up
Some of you may or may not remember bits and pieces of the "new math" being taught to 7th and 8th graders in public schools in the late '60s.

14+-20.   It equals -6.

But ... does anything less than 0 exist?

Actually, YES!
Let's say you have $150.  You purchase an item for $210.    150+-210=-60.
That's the amount you're in debt to your purchase:  $60.
Then you come by an extra $100.   Are you $100 ahead?
-60+100.   NO!   You're ahead by $40 (or +40).

It's kind of an abstract twist on the "basic arithmetic" you learned in grade school.
And one that makes perfect sense in this day and age of credit cards and on-line shopping.

                                        Another site to check out:

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