“Don’t Slow Me Down With That Calculator.” Solving math problems without pencil and paper
Edited By Willage, Marc B.Friday, April 18, 2025
On April 17, 2025, Cliff Patrek gave a talk about “Mental Math; a former mathematics teacher in the high school level, Cliff describes that this is the 156th Talk that he has given since the late 90s. Instead of naming his book “Mental Math,” he entitled it “Don’t Slow Me Down With That Calculator.”At times almost appearing like a magician, he shared with us a number of tricks to use when carrying out calculations without pencil or paper. But he carefully and very systematically, showed what was behind the amazing tasks he was able to carry out. He was not pretentious and obviously loved talking about this topic.
In the photograph of Cliff, he is standing next to an overhead projector, and Berghoff restaurant still had a projection screen around. He simply has not found a more recently developed projection system that allowed him to move all over the projection field, without generating an unacceptable amount of glare.
Newsletters
_________________
There are no newsletters to display at this time.
WE CONNECT PEOPLE
Rotary unites more than a million people
Through Rotary clubs, people from all continents and cultures come together to exchange ideas, and form friendships and professional connections while making a difference in their backyards and around the world.
WE TRANSFORM COMMUNITIES
We take action locally and globally
Each day, our members pour their passion, integrity, and intelligence into completing projects that have a lasting impact. We persevere until we deliver real, lasting solutions.
WE SOLVE PROBLEMS
No challenge is too big for us
For more than 110 years, we’ve bridged cultures and connected continents to champion peace, fight illiteracy and poverty, promote clean water and sanitation, and fight disease.
Together, we see a world
where people unite and take action
to create lasting
change across the globe,
in our communities, and in ourselves.