Square Root Of Decimal (example) | Numbers And Operations | 8th Grade | Khan Academy


Learn how to find the square root of a decimal number. The problem solved in this video is p^2 = 0.81.

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8th grade on Khan Academy: 8th grade is all about tackling the meat of algebra and getting exposure to some of the foundational concepts in geometry. If you get this stuff (and you should because you’re incredibly persistent), the rest of your life will be easy. Okay, maybe not your whole life, but at least your mathematical life. Seriously, if you really get the equations and functions stuff we cover here, most of high school will feel intuitive, even relaxing. (Content was selected for this grade level based on a typical curriculum in the United States.)

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16 thoughts

  1. I know u already did some gradient/slope videis but can u go into bisectors, gradient intercept formulae amd in general form (really in depth please) and also how to to convert from one to another.
    If youbcould do this it would be much appreciated
    Thanks

  2. @Lejla Rezania : Sometimes when I get confused with this, I do the following:
     0.9*0.9 = (9/10) * (9/10) = 81/100 = 0.81
    This might help. CHEERS!

  3. don’t mean to be mean, Mr. Khan, but shouldn’t .9 time .9 equal 8.1 instead of .81?

    (*Edit:* wait, I was wrong. 8.1 is .9 times 9.)

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