US “Common Core” Math gets a bit too convoluted

How would you solve 427-316?

Most people educated in the past would simply use the usual subtraction working to arrive at the answer of 111.

But lately, in the USA, the Common Core Math approach gets very complicated and teaches an approach that even the father who has a “Bachelor of Science Degree in Electronics Engineering, which included extensive study in differential equations and other higher math applications” cannot explain it, nor get the answer correct.

common core

See also the Common Core method of adding 26+17:common core addition

common-core-number-bonds

Is it really necessary to use “number bonds” to “skip-count by seven” to add 7+7?

I agree with the father above that in Maths, “simplification is valued over complication”. This is why I always teach the easiest to understand method and the shortest method to solve questions to my students. No point using a complicated method when a shorter and simpler method can give the same answer!

Tung Soo Hua 董素华 Honours Bachelor of Science degree in Mathematics

Tung Soo Hua (Chinese: 董素华; pinyin: Dǒng Sùhúa, Dong Suhua) is an award-winning television news anchor and current affairs presenter with MediaCorp TV Channel 8 and Channel U. (Wikipedia)

Tung won the Best Chinese-language News Presenter award for Star Awards in 2004, 2005, 2006, 2007, 2009 and 2011 Star Awards.

Tung studied in Nanyang Girls’ High School, and graduated with a Masters degree in Social Sciences (International Studies) from the National University of Singapore, after obtaining her first Honours Bachelor of Science degree in Mathematics.

Source: http://www.science.nus.edu.sg/science-alumni/alumni-awards/science-alumni-awards-2014/30-alumni/369-osa-2011-tung-soo-hua

Outstanding Science Alumni Award 2011 TUNG Soo Hua
BSc (Hons) 1997, M.Soc.Sci. 2007
Presenter/Senior Producer, Chinese News, MediaCorp Pte Ltd

Ms Tung Soo Hua is an award-winning television news and current affairs presenter with MediaCorp, Singapore’s leading media company. Currently, she co-hosts “Evening News at 10pm” on the most watched Mandarin channel in Singapore, Channel 8, and fronts “Money Week”, a weekly financial programme on Channel U. She started her journalism career in MediaCorp as a Chinese-language news producer in 1997.

Ms Tung was named the “Best News/Current Affairs Presenter” for six times between 2004 and 2011 in “Stars Awards”, which is MediaCorp’s gala event recognising its talents for their excellence. She graduated with a Masters degree in Social Sciences (International Studies) from the National University of Singapore, after obtaining her first Honours Bachelor of Science degree in Mathematics.

Read more at: http://www.science.nus.edu.sg/science-alumni/alumni-awards/science-alumni-awards-2014/30-alumni/369-osa-2011-tung-soo-hua

Recommended Math book:

Currently in its eighteenth printing in Japan, this best-selling novel is available in English at last. Combining mathematical rigor with light romance, Math Girls is a unique introduction to advanced mathematics, delivered through the eyes of three students as they learn to deal with problems seldom found in textbooks. Math Girls has something for everyone, from advanced high school students to math majors and educators.