Square and Cube Roots Calculations by Heart

[Axtremus]

Link to video

Just curious if anyone has ever learnt these square and cube root methods in school. I don’t think I have.

[Jolly]

BIL could do logarithms in his head.

[Ivorythumper]

@Axtremus very cool.

[George K]

Cool indeed. There are lots of neat math tricks like that that I wish I had learned when it would have been useful to me.

Like in grades 6-8.

[Horace]

The square root of 11.56 doesn't require some tricky algorithm. Just the recognition that it'll be between 3 and 4, with one decimal digit of either 4 or 6. That leaves either 3.4 or 3.6. No tricks required, just simple insights that you would expect a numerate problem solver to understand.

[taiwan_girl]

That was neat.

[LuFins Dad]

Did anyone else expect the video to be Annn and Nancy Wilson singing about square roots? Or was that just me?

[George K]

@LuFins-Dad said in Square and Cube Roots Calculations by Heart:

Did anyone else expect the video to be Annn and Nancy Wilson singing about square roots? Or was that just me?

Yeah...it was just you.