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!