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Squaring, which we learned about in a previous lesson (exponents), has an inverse too, called "finding the square root." Remember, the square of a number is that number ... The square root of a number, n, written ... Note: There are a number of ways to calculate square roots without a calculator. This is only one of them.
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www.math.com/school/subject1/lessons/S1U1L9DP.html
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How to calculate a square root without a calculator and should your child learn how to do it ... Then double the number above the square root symbol line (highlighted), and write it down in parenthesis with an empty line next to it as shown.
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www.homeschoolmath.net/teaching/square-root-algorithm.p...
www.homeschoolmath.net/teaching/square-root-algorithm.php
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A square root goes the other way: ... The Easiest Way to Calculate a Square Root ... What if you have to guess the square root for a difficult number such as "82,163" ... ?
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www.mathsisfun.com/square-root.html
www.mathsisfun.com/square-root.html
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In the above example as it is presented, one would be able to calculate the square root of 1234.56 to four decimal places beyond the decimal point2. As many additional pairs of zeroes could be added to the end of the number as one wished to calculate.
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www.bbc.co.uk/dna/h2g2/classic/A827453
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To actually calculate a square root to a large number of digits quickly, one uses a different method. For example, saying that x^2 = a is the same as saying x = (1/2)(x + a/x) and you can use this as the basis of an iteration.
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www.math.toronto.edu/mathnet/questionCorner/sqrootcalc....
www.math.toronto.edu/mathnet/questionCorner/sqrootcalc.html
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"By Newton's Iteration" The method most commonly used for computing the square root of a number is called Newton's Iteration after its inventor, Isaac Newton. It is a recurrence relation given by the formula, Where the first itera...
http://askville.amazon.com/calculate-square-root-number...
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Finding square roots [6/17/1996] How do you find the square root of a number? ... Method to Find Square Root of Pi [03/30/1997] How do I calculate the square root of Pi?
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mathforum.org/dr.math/tocs/squareroot.middle.html
mathforum.org/dr.math/tocs/squareroot.middle.html
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･ Write down the number you wish to calculate the square root of, separating the digits into pairs , starting... ･ Look at the leftmost pair and find the biggest integer n whose square is less than or equal to it. Place... ･ Subtract the nu...
http://www.wikihow.com/Calculate-a-Square-Root-by-Hand
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