theadanews.com - Ada, Oklahoma

Editorials

July 10, 2013

Practical mathematics

Ada —

Math is important and math teachers have a hard job. It’s not just teaching math; it’s what math you should teach. Should you teach the students who are going to design computers, the ones who are going to wash your car, or the ones in between? As a teacher, you don’t have a choice; you’ve got to teach all of them. And it would be nice if they learned something useful.

I am a mathematician, but I don’t really know any useful math, just the theoretical stuff. However — out of shame — over the years I’ve learned one or two tricks about doing practical arithmetical calculations.

For example, say you take the clan out for a bite at Chili’s. The bill comes and it’s $84.12. It’s a chunk, but you don’t eat out that often. You are about to leave a 10 percent tip because it’s easy to figure, but your daughter informs you that 10 percent is not enough. Some of her friends wait tables and they need the tips, so you have to leave at least 15 percent or let your daughter die of terminal embarrassment, but you don’t have a calculator. What do you do, what do you do?

One answer is to plop down $10 and forget about it, relying on the fact you daughter doesn’t know how to do percentages either. There is another way, however. Ten percent of 84.12 is 8.40. Yes, I know it’s 8.41, but if a penny is going to save their life, they are going to die anyway. Five percent is half of 10 percent and that is 4.20. Add those together and you get 12.60, i.e. 15 percent. Round it up to $15 because the waitress is cute. And when you reach the age of 50, they are all cute by the way.

Text Only | Photo Reprints
Editorials
  • Do I have to be numb to serve?

    How well do you do watching the channels on TV that show sick and starving children in other countries?

    July 23, 2014

  • Too much sodium can be a health risk

    Salty potato chips. Salted popcorn. Salt on French fries. We are a nation that loves salt. Although it enhances the flavor of foods, too much sodium is not a good thing.

    July 19, 2014

  • Working cattle during summertime heat

    Understanding and avoiding heat stress in cattle can be a valuable management tool for summertime in Oklahoma.   

     

    July 19, 2014

  • NASA says life on other planets is no longer a fool’s errand

    It has always seemed unlikely to me that this universe, the size of which renders you and me microscopic, could contain only us. Then again, it could, and certainly authors of “The Privileged Planet” make a strong case for it.

     

    July 19, 2014

  • Historic icon raised to celebrate Capitol's 100th birthday

    It was with great fanfare nearly a century ago that Oklahomans crowded into cars or horse-drawn buggies and paraded to 23rd and Lincoln.

     

    July 19, 2014

  • Jerry Duncan Are there absolutes that can be trusted?

    Back in the 70s there was a film series with the philosopher Francis Schaeffer titled, “How Shall We Then Live.” He described how every nation that became the leading nation of the world had a discernable and predictable rise and fall.

     

    July 16, 2014 1 Photo

  • Ukraine is a personal tragedy for one Ada resident

    Democracy is the worst form of government, the sage has said, except for everything else.

    July 14, 2014

  • Franz case raises troubling questions

    Dear Editor,

    What kind of law and judges do we have in Ada?

    July 14, 2014

  • Fourth of July celebration capped week of fun events

       Over 380 eggs, over 100 water balloons, over 40 turtles, boxes of ice cream bars, unlimited prizes, rope and a creek, judo, longest standing 5K/10K race in Oklahoma, cans of whipped cream, colored powder celebration, motorized train, Bernoulli’s Principle, miniature golf, shaved-ice snow cones, fire truck hose wars, and a most awesome fireworks display that scared the ducks all the way to Wapanucka. 

    July 14, 2014

  • Common Core: The untold story

    Oklahoma public school educators may be forgiven if they liken themselves to a soccer ball in a World Cup championship match.

    July 14, 2014

AP Video
The Carbon Trap: US Exports Global Warming UN Security Council Calls for Gaza Cease-fire Traditional African Dishes Teach Healthy Eating 13 Struck by Lightning on Calif. Beach Baseball Hall of Famers Inducted Israel, Hamas Trade Fire Despite Truce in Gaza Italy's Nibali Set to Win First Tour De France Raw: Shipwrecked Concordia Completes Last Voyage Raw: Sea Turtle Hatchlings Emerge From Nest Raw: Massive Dust Storm Covers Phoenix 12-hour Cease-fire in Gaza Fighting Begins Raw: Bolivian Dancers Attempt to Break Record Raw: Israel, Palestine Supporters Rally in US Raw: Air Algerie Flight 5017 Wreckage Virginia Governor Tours Tornado Aftermath Judge Faces Heat Over Offer to Help Migrant Kids Kangaroo Goes Missing in Oklahoma More M17 Bodies Return, Sanctions on Russia Grow Raw: Deadly Tornado Hits Virginia Campground Ohio State Marching Band Chief Fired After Probe
Stocks
Poll

Are you pleased that Oklahoma has repealed Common Core standards for public school students?

Yes
No
     View Results