![Algebra with Stamps](http://mathfour.com/wp-content/uploads/2011/09/MathFourStampsFI.png)
I mailed thank you notes for Daughter’s birthday gifts the other day. And wouldn’t you know it, using the stamps involved algebra! Continue Reading →
I mailed thank you notes for Daughter’s birthday gifts the other day. And wouldn’t you know it, using the stamps involved algebra! Continue Reading →