03 – Psychological Math Secrets and techniques! – The Secret to Psychological Addition – Math Tips for Quick Calculations!

Superb???

7:35 I have always been shit at mental calculation so the fact that i was able to say 63 out loud in less than a second using this method made me feel so great.

Wow!

Nice but I have a question.I thought that compliments of numbers add to 9 .As you said the compliments of numbers add to 10, then what do you call the numbers add to 9?please reply.Thank you.

u dome

Oh my god you freaking genius! Thank you so much!!

Thank you

I do not have words to discribe how i really appreciate your knowledge to share with me??

I came up with an easier way to do this calculation
For example 100-43
43 take it to 50 that is 7 100-50=50 and +7 is 57

This is how I do it. I also used the joints on my fingers to add up when I was a kid so I could add up numbers up to 30 instead of just 10 . I also got into the habit of when adding a number say 7 just add 10 and then take away 3 which is the difference between 7 and 10. Plus I learned all complementary numbers up to a hundred. This all started from counting on fingers. Do teachers encourage kids to do this at beginning school these days? There should be no calculators in elementary and junior schools.
Regarding education there are too many people who say they don't need to learn to do something themselves because they can either Google it or get somebody else to do it for them. An all round education is being dropped, instead you now have to pass certain tests.